Sampling Distribution of the Sample Mean

Explore how averages vary across repeated samples, how finite populations change precision, and why shared errors can survive averaging. Work with exact normal models, enumerated populations, estimated standard errors and design critiques.

Prerequisites: Repeated sampling, expectation, variance and normal distributions. Includes single-select and multiselect practice with worked explanations and misconception analysis. Questions are independently answerable; local learning order progresses from foundations to analytical challenges.