Sampling Distribution of

Differences Between Means

This applet presents three different graphics. The top one represents two different populations, and you can vary the difference between their means. The middle one presents the sampling distribution of the mean for samples taken from each of those populations. The bottom one represents the distribution of differences between means.

The applet is shown below

Move the sliders in the top graph to change the mean difference and the standard deviations as on previous applets. Move the side slider in the bottom graph to change the number of observations on which the mean of each group is based.

Move the slider on the upper right to change the standarad deviations of the populations. What happens to the resulting sampling distribution of differences between means.?
Move the slider on the lower right to change the sample size. What happens when you do that?
Note how the sampling distribution changes as you change the distance between the means.

Comments to: Gary.McClelland@Colorado.edu

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