One sample has SS = 80 and a second sample has SS = 48. a. If n

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One sample has SS = 80 and a second sample has SS = 48.

a. If n = 17 for both samples, find each of the sample variances, and calculate the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances.

b. Now assume that n = 17 for the first sample and n = 5 for the second. Again, calculate the two sample variances and the pooled variance. You should find that the pooled variance is closer to the variance for the larger sample.  

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Essentials Of Statistics For The Behavioral Sciences

ISBN: 9780357365298

10th Edition

Authors: Frederick J Gravetter, Larry B. Wallnau, Lori Ann B. Forzano, James E. Witnauer

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