For each of the following, calculate the pooled variance and the estimated standard error for the sample

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For each of the following, calculate the pooled variance and the estimated standard error for the sample mean difference.
a. The first sample has n = 4 scores and a variance of s2 = 55, and the second sample has n = 6 scores and a variance of s2 = 63.
b. Now the sample variances are increased so that the first sample has n = 4 scores and a variance of s2 = 220, and the second sample has n = 6 scores and a variance of s2 = 252.
c. Comparing your answers for parts a and b, how does increased variance influence the size of the estimated standard error?
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Essentials Of Statistics For The Behavioral Sciences

ISBN: 9781133956570

8th Edition

Authors: Frederick J Gravetter, Larry B. Wallnau

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