Home · Unit 4 · Topic 5 · Sample means

Sample means

Understand the concept of the sample mean X̄ as a random variable whose value varies between samples where X is a random variable with mean μ and the standard deviation σ.

u4-t5-s1-d1

Interactive

Building the distribution of x̄

manipulative

Draw repeated samples of size n from a shaped population (μ, σ editable) and watch the distribution of sample means x̄ narrow and approach normality.

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