Photo Ken Treloar on Unsplash

Every time I teach the Central Limit Theorem, I get questions from students on why we divide the population standard deviation, sigma, by the square root of the sample size to calculate the standard deviation of the sampling distribution which we call the standard error.

Recall that the equation for the standard error is

Dawn Wright

Transwoman, Early TransAdvocate, USAF Academy Grad, Ph.D., Adjunct Professor Statistics, Perpetual Learner

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store