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4 Tutorials that teach Center and Variation of a Sampling Distribution
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Center and Variation of a Sampling Distribution

Center and Variation of a Sampling Distribution

Description:

This lesson will explain how to find the mean and standard deviation of a sampling distribution of the sample means.

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Tutorial

Notes on "Center and Variation of a Sampling Distribution"

Overview

(0:00-0:39) Definition of the Mean of Distribution of Sample Means

(0:40-1:12) Definition of the Standard Deviation of Distribution of Sample Means

(1:13-2:33) Example of Finding the Mean and Standard Deviation of the Distribution of Sample Means

Terms to Know
Mean of a Distribution of sample means

The average of all possible means from all possible samples of a given size. It will be equal to the mean of the original population.

Standard Deviation of a Distribution of sample means

The standard deviation of all possible means from all possible samples of a given size. It will be equal to the standard deviation of the original population, divided by the square root of the sample size.

Formulas to Know
Mean of a Distribution of sample means

mu subscript x with bar on top end subscript space equals space mu subscript o r i g i n a l end subscript

Standard Deviation of a Distribution of sample means

sigma subscript x with bar on top end subscript space equals space fraction numerator sigma over denominator square root of n end fraction