Lemma
MediumSampling distributions
OpenStax, Introductory Statistics 2e §7.2 The Central Limit Theorem for Sums · Exercise 23 · Statistics · Sampling distributions

The Central Limit Theorem for Sums · Exercise 23

An unknown distribution has a mean of 25 and a standard deviation of six. Let X = one object from this distribution. What is the sample size if the standard deviation of ΣX is 42?

~8 minWritten answer · compare with the solution

OpenStax, Introductory Statistics 2e · §7.2 The Central Limit Theorem for Sums · Exercise 23

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.