Random Sampling in Statistics: Expected Value and Variance of the Sample Mean

Here we compute the expected value and variance of the sample mean. This will help us understand properties about the larger population, and how it relates to smaller random sampling. This is useful, for example in political polling, drug trials, A/B testing of website designs (and YouTube thumbnails!), and much more!

This video was produced at the University of Washington, and we acknowledge funding support from the Boeing Company

%%% CHAPTERS %%%
00:00 Intro
03:04 Proof: Simple Sample is an Unbiased Estimate
09:33 Variance Over Independent Samples
13:49 Preview: Variance of Samples from Finite Population
15:46 Outro Receive SMS online on sms24.me

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