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Calculating the Sample Size with a Finite Population in Excel
 
05:59
This video demonstrates how to calculate the sample size with a finite population using Microsoft Excel. Variables used in the sample size equation include the confidence level, population proportion, confidence interval (margin of error) and the population size.
Views: 26487 Dr. Todd Grande
Determining sample size based on confidence and margin of error | AP Statistics | Khan Academy
 
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Determining sample size based on confidence level and margin of error. View more lessons or practice this subject at http://www.khanacademy.org/math/ap-statistics/estimating-confidence-ap/one-sample-z-interval-proportion/v/determining-sample-size-based-on-confidence-and-margin-of-error?utm_source=youtube&utm_medium=desc&utm_campaign=apstatistics AP Statistics on Khan Academy: Meet one of our writers for AP¨_ Statistics, Jeff. A former high school teacher for 10 years in Kalamazoo, Michigan, Jeff taught Algebra 1, Geometry, Algebra 2, Introductory Statistics, and AP¨_ Statistics. Today he's hard at work creating new exercises and articles for AP¨_ Statistics. Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc
Views: 59234 Khan Academy
Sampling from a finite population
 
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Sampling from a finite population.mp4
Views: 12429 zedstatistics
How to calculate Sample Size
 
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A video on how to calculate the sample size. Includes discussion on how the standard deviation impacts sample size too. Like us on: http://www.facebook.com/PartyMoreStudyLess Related Video How to calculate Samples Size Proportions http://youtu.be/LGFqxJdk20o
Views: 266537 statisticsfun
Calculating Required Sample Size to Estimate Population Mean
 
02:19
statisticslectures.com - where you can find free lectures, videos, and exercises, as well as get your questions answered on our forums!
Views: 82656 statslectures
Standard error of the mean | Inferential statistics | Probability and Statistics | Khan Academy
 
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Standard Error of the Mean (a.k.a. the standard deviation of the sampling distribution of the sample mean!) Watch the next lesson: https://www.khanacademy.org/math/probability/statistics-inferential/sampling_distribution/v/sampling-distribution-example-problem?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Missed the previous lesson? https://www.khanacademy.org/math/probability/statistics-inferential/sampling_distribution/v/sampling-distribution-of-the-sample-mean-2?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy’s Probability and Statistics channel: https://www.youtube.com/channel/UCRXuOXLW3LcQLWvxbZiIZ0w?sub_confirmation=1 Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 825291 Khan Academy
How to calculate sample size and margin of error
 
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In this tutorial I show the relationship between sample size and margin of error. I calculate the margin of error and confidence interval using three different sample sizes. As the sample size increases the margin of error goes down. Like us on: http://www.facebook.com/PartyMoreStudyLess Related Videos on Sample Size: Sample Size http://youtu.be/Z2dKK1xicgs Sample Size of a Proportion http://youtu.be/LGFqxJdk20o
Views: 121434 statisticsfun
Sampling distribution of the sample mean | Probability and Statistics | Khan Academy
 
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The central limit theorem and the sampling distribution of the sample mean Watch the next lesson: https://www.khanacademy.org/math/probability/statistics-inferential/sampling_distribution/v/sampling-distribution-of-the-sample-mean-2?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Missed the previous lesson? https://www.khanacademy.org/math/probability/statistics-inferential/sampling_distribution/v/central-limit-theorem?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy’s Probability and Statistics channel: https://www.youtube.com/channel/UCRXuOXLW3LcQLWvxbZiIZ0w?sub_confirmation=1 Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 818092 Khan Academy
Statistics: Sample vs. Population Mean
 
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The difference between the mean of a sample and the mean of a population.
Views: 806473 Khan Academy
Inferring population mean from sample mean | Probability and Statistics | Khan Academy
 
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Much of statistics is based upon using data from a random sample that is representative of the population at large. From that sample mean, we can infer things about the greater population mean. We'll explain. Watch the next lesson: https://www.khanacademy.org/math/probability/descriptive-statistics/box-and-whisker-plots/v/reading-box-and-whisker-plots?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Missed the previous lesson? https://www.khanacademy.org/math/probability/descriptive-statistics/central_tendency/v/comparing-means-and-medians?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy’s Probability and Statistics channel: https://www.youtube.com/channel/UCRXuOXLW3LcQLWvxbZiIZ0w?sub_confirmation=1 Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 323754 Khan Academy
The Sampling Distribution of the Sample Mean (fast version)
 
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I have a slightly slower and more refined version of this video available at http://youtu.be/q50GpTdFYyI. I discuss the sampling distribution of the sample mean, and work through an example of a probability calculation. (I only briefly mention the central limit theorem here, but discuss it in more detail in another video).
Views: 160250 jbstatistics
Calculating Sample Size to Estimate Population Mean
 
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This video shows how to calculate the sample size n required to estimate the population mean µ.
Views: 9867 Joshua Emmanuel
How to calculate standard error for the sample mean
 
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Find more videos and articles at: http://www.statisticshowto.com
Views: 113205 Stephanie Glen
Proof that the Sample Variance is an Unbiased Estimator of the Population Variance
 
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A proof that the sample variance (with n-1 in the denominator) is an unbiased estimator of the population variance. In this proof I use the fact that the sampling distribution of the sample mean has a mean of mu and a variance of sigma^2/n. If you need that to be shown as well, I show that in this video: http://youtu.be/7mYDHbrLEQo.
Views: 180940 jbstatistics
Confidence Intervals for a Proportion:  Determining the Minimum Sample Size
 
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I discuss determining the minimum sample size required to achieve a given margin of error when estimating a population proportion. (For intervals based on the normal approximation.)
Views: 36600 jbstatistics
Determining Sample Size
 
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Views: 85466 tPCAonline1
What is sampling error?
 
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Sampling error is unavoidable; but in this video Elon University’s Political Science Professor Kenneth Fernandez defines sampling error and how to reduce it.
Views: 42946 Elon University Poll
Population vs sample
 
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Population vs sample - The first step of every statistical analysis you will perform is to determine whether the data you are dealing with is a population or a sample. A population is the collection of all items of interest to our study and is usually denoted with an uppercase N. The numbers we’ve obtained when using a population are called parameters. A sample is a subset of the population and is denoted with a lowercase n, and the numbers we’ve obtained when working with a sample are called statistics. Populations are hard to define and observe. On the other hand, sampling is difficult. But samples have two big advantages. First, after you have experience, it is not that hard to recognize if a sample is representative. And, second, statistical tests are designed to work with incomplete data; thus, making a small mistake while sampling is not always a problem. Website: https://365datascience.com Facebook: https://www.facebook.com/365datascience Twitter: https://twitter.com/365datascience LinkedIn: https://www.linkedin.com/company-beta/18061054/ Google+: https://plus.google.com/114636546494634370189/
Views: 29098 365 Data Science
Calculating Power and the Probability of a Type II Error (A One-Tailed Example)
 
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An example of calculating power and the probability of a Type II error (beta), in the context of a Z test for one mean. Much of the underlying logic holds for other types of tests as well. If you are looking for an example involving a two-tailed test, I have a video with an example of calculating power and the probability of a Type II error for a two-tailed Z test at http://youtu.be/NbeHZp23ubs.
Views: 274440 jbstatistics
Calculate A Sample Size of A proportion
 
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How to calculate a sample size for a proportion (percentage). Includes discussion on how sample changes as proportions (percentages) change. Calculating Sample Size https://youtu.be/i47gaNmEUM0 Calculating z scores https://www.youtube.com/playlist?list=PL6157D8E20C151497 Facebook http://www.Facebook.Com/PartyMoreStudyLess Professor of the Universe: David Longstreet http://www.linkedin.com/in/davidlongstreet/ MyBookSucks.Com
Views: 20583 statisticsfun
Selecting a Random Sample using SPSS
 
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This video demonstrates how to select a random sample using SPSS. The “Select Cases” function is used to select random samples and other types of samples.
Views: 12368 Dr. Todd Grande
Standard Deviation Formula, Statistics, Variance, Sample and Population Mean
 
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This statistics video tutorial explains how to use the standard deviation formula to calculate the population standard deviation. The formula for the sample standard deviation is also provided. This video shows you the variables associated with the sample mean and the population mean. In addition, it discusses how to calculate variance from standard deviation.
How to calculate Confidence Intervals and Margin of Error
 
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Tutorial on how to calculate the confidence interval and margin of error (interval estimate). Include an example and some discussion on the bell curve and z scores. Like MyBookSucks on: http://www.facebook.com/PartyMoreStudyLess Related Videos: Z scores and Normal Tables http://www.youtube.com/watch?v=q5fwClqKCSw How to Normalized Tables Used for Z scores http://www.youtube.com/watch?v=dWu0KLXuEpA Playlist t tests for independent and dependent means. http://www.youtube.com/playlist?list=PL8B759A5C1C5C12AF Created by David Longstreet, Professor of the Universe, MyBookSucks http://www.linkedin.com/in/davidlongstreet
Views: 255631 statisticsfun
Confidence Interval for Population Means in Statistics
 
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Get the full course at: http://www.MathTutorDVD.com In this lesson, we'll discuss the concept of the confidence interval in statistics. We'll solve a few problems where we must calculate the confidence interval of a population mean when given information such as the sample size, margin of error, and the sample mean.
Views: 322476 mathtutordvd
The Sampling Distribution of the Sample Mean
 
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I discuss the sampling distribution of the sample mean, and work through an example of a probability calculation. (I only briefly mention the central limit theorem here, but discuss it in more detail in another video). The mean and standard deviation of the amount of protein in a quarter pound patty of lean beef was found in the USDA nutrient database at: http://ndb.nal.usda.gov/ndb/foods/show/7413?fg=&man=&lfacet=&format=&count=&max=25&offset=&sort=&qlookup=beef+hamburger
Views: 165282 jbstatistics
Small sample size confidence intervals | Probability and Statistics | Khan Academy
 
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Constructing small sample size confidence intervals using t-distributions Watch the next lesson: https://www.khanacademy.org/math/probability/statistics-inferential/margin-of-error/v/mean-and-variance-of-bernoulli-distribution-example?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Missed the previous lesson? https://www.khanacademy.org/math/probability/statistics-inferential/confidence-intervals/v/confidence-interval-example?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy’s Probability and Statistics channel: https://www.youtube.com/channel/UCRXuOXLW3LcQLWvxbZiIZ0w?sub_confirmation=1 Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 307268 Khan Academy
Sampling distribution example problem | Probability and Statistics | Khan Academy
 
14:28
Figuring out the probability of running out of water on a camping trip Watch the next lesson: https://www.khanacademy.org/math/probability/statistics-inferential/confidence-intervals/v/confidence-interval-1?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Missed the previous lesson? https://www.khanacademy.org/math/probability/statistics-inferential/sampling_distribution/v/standard-error-of-the-mean?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy’s Probability and Statistics channel: https://www.youtube.com/channel/UCRXuOXLW3LcQLWvxbZiIZ0w?sub_confirmation=1 Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 585636 Khan Academy
Variation and Sampling Error
 
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Statistical methods are necessary because of the existence of variation. Sampling error is one source of variation, and is often misunderstood.This video explains sampling error.
Sampling & its 8 Types: Research Methodology
 
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Dr. Manishika Jain in this lecture explains the meaning of Sampling & Types of Sampling Research Methodology Population & Sample Systematic Sampling Cluster Sampling Non Probability Sampling Convenience Sampling Purposeful Sampling Extreme, Typical, Critical, or Deviant Case: Rare Intensity: Depicts interest strongly Maximum Variation: range of nationality, profession Homogeneous: similar sampling groups Stratified Purposeful: Across subcategories Mixed: Multistage which combines different sampling Sampling Politically Important Cases Purposeful Sampling Purposeful Random: If sample is larger than what can be handled & help to reduce sample size Opportunistic Sampling: Take advantage of new opportunity Confirming (support) and Disconfirming (against) Cases Theory Based or Operational Construct: interaction b/w human & environment Criterion: All above 6 feet tall Purposive: subset of large population – high level business Snowball Sample (Chain-Referral): picks sample analogous to accumulating snow Advantages of Sampling Increases validity of research Ability to generalize results to larger population Cuts the cost of data collection Allows speedy work with less effort Better organization Greater brevity Allows comprehensive and accurate data collection Reduces non sampling error. Sampling error is however added. Population & Sample @2:25 Sampling @6:30 Systematic Sampling @9:25 Cluster Sampling @ 11:22 Non Probability Sampling @13:10 Convenience Sampling @15:02 Purposeful Sampling @16:16 Advantages of Sampling @22:34 #Politically #Purposeful #Methodology #Systematic #Convenience #Probability #Cluster #Population #Research #Manishika #Examrace For IAS Psychology postal Course refer - http://www.examrace.com/IAS/IAS-FlexiPrep-Program/Postal-Courses/Examrace-IAS-Psychology-Series.htm For NET Paper 1 postal course visit - https://www.examrace.com/CBSE-UGC-NET/CBSE-UGC-NET-FlexiPrep-Program/Postal-Courses/Examrace-CBSE-UGC-NET-Paper-I-Series.htm
Views: 319232 Examrace
Confidence Intervals for Population Proportions
 
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statisticslectures.com - where you can find free lectures, videos, and exercises, as well as get your questions answered on our forums!
Views: 174139 statslectures
Statistical methods used to calculate sample sizes
 
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This Video covers the statistical methods used to calculate sample sizes for both attribute and variables data. Methods for collecting the sample will be covered. Every sampling plan has risks. This webinar covers how to calculate Type I and Type II errors. A discussion of how the FDA views sampling plans, especially for validation and acceptance activities. Sample size to ensure a certain level of process capability will be covered. For More Information Contact - Organization: NetZealous BDA GlobalCompliancePanel Website: http://www.globalcompliancepanel.com/ Email: [email protected] Help us caption & translate this video! http://amara.org/v/OXHH/
Confidence Intervals for One Mean:  Determining the Required Sample Size
 
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I find the sample size required to obtain a given margin of error in a confidence interval for mu. I discuss the appropriate formula and work through an example.
Views: 40121 jbstatistics
Sampling: Populations and samples, parameters and statistics
 
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Sampling: Populations and samples, parameters and statistics For a full course of free Stats videos and projects, see mrpethan.com.
Views: 33597 apethan
Estimating Sample Size Using Excel
 
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This video demonstrates how to estimate a sample size using Microsoft Excel.
Views: 33841 Dr. Todd Grande
Standard Error
 
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Paul Andersen shows you how to calculate the standard error of a data set. He starts by explaining the purpose of standard error in representing the precision of the data. The standard error is based on the standard deviation and the sample size. He works a problem and gives the viewer a problem to work on their own. Standard Error of Data Set 1: 3 The error bars should extend from 9 to 15 Standard Deviation Video: https://www.youtube.com/watch?v=09kiX3p5Vek Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Views: 366071 Bozeman Science
Lesson 10 - Statistics Population Mean & Sample Mean
 
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This is just a few minutes of a complete course. Get full lessons & more subjects at: http://www.MathTutorDVD.com. You will learn about the population mean in statistics and how it differs from the sample mean. We will first define the population mean and learn how to calculate the mean with the statistics mean formula.
Views: 46019 mathtutordvd
Probability Problems Using the Sampling Distribution of the Proportion
 
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These are 2 probability questions involving the sampling distribution of the proportions. The TI 84 calculator is used for calculating the area under the normal curve. Reference: examples 8.20 and 8.21 from Introduction to Statistics by DeSanto, Totoro, and Moscatelli.
Views: 36159 ProfThacker
Statistics Lecture 7.2: Finding Confidence Intervals for the Population Proportion
 
02:24:10
Statistics Lecture 7.2: Finding Confidence Intervals for the Population Proportion
Views: 139596 Professor Leonard
Sampling and Sampling Distributions
 
38:22
DescriptionThis tutorial discusses the sampling distribution of the sample mean and sample proportion. The Central Limit Theorem is discussed as are several Probability and Non-Probability Sampling Methods. The standard deviation for the sampling distribution, also known as the standard error of the estimate, is introduced, and its formula is shown and demonstrated. The finite population correction is also shown and discussed.
Views: 8355 Learn Something
VIDEO How to Determine Sample Size
 
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Video on the formula for determining sample size.
Views: 16531 Kevin Brown
Calculating Power and the Probability of a Type II Error (A Two-Tailed Example)
 
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An example of calculating power and the probability of a Type II error (beta), in the context of a two-tailed Z test for one mean. Much of the underlying logic holds for other types of tests as well. I have a related video with a one-tailed Z test example available at http://youtu.be/BJZpx7Mdde4.
Views: 127188 jbstatistics
How to use  Excel to Calculate Confidence Interval
 
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Tutorial on using Microsoft Excel to determine confidence internals, margin of error, range, max, min and margin of error Playlist on Confidence Intervals http://www.youtube.com/course?list=EC36B51DB57E3A3E8E Related Videos: How to Read A Normalized Table (for z scores). http://www.youtube.com/watch?v=dWu0KLXuEpA Like MyBookSucks on: http://www.facebook.com/PartyMoreStudyLess Like us on: http://www.facebook.com/PartyMoreStudyLess David Longstreet Professor of the Universe Professor of the Universe: David Longstreet http://www.linkedin.com/in/davidlongstreet/ MyBookSucks.Com
Views: 547880 statisticsfun
M17 Sample Size for Estimation
 
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Find the sample size required to estimate population parameters using Minitab 17.
Views: 14645 Erich Goldstein
Random Error: Part 1 - Sampling variation & Sampling error
 
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We focus on the errors we make when we use data from a sample to tell us something about a whole population and ask the question, “How wrong could I be?”
Views: 3759 Wild About Statistics
How To... Create a Random Data Sample in Excel 2013
 
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When you need to select a sample from a population for analysis, it is important that you are sure that the sample is randomly drawn from the population. This will remove bias - if you do not use random selection the sample could favour selection for certain groups, possibly without you even realizing it. Learn how to use Data Analysis tools to let Excel randomly select sample data for you. Requires Excel's Data Analysis Toolpak Add-In.
Views: 36933 Eugene O'Loughlin
Confidence Intervals for One Population Variance
 
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I discuss confidence intervals for a single population variance. The methods used here are based on the assumption of sampling from a normally distributed population (these methods involve the chi-square distribution). The underlying logic behind the form of the interval is discussed, and an example is then worked through.
Views: 49240 jbstatistics