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Two separate samples receive different treatments. After treatment, the first sample has n = 9 with S S = 462 , and the second has n = 7 with S S = 420 . a. Compute the pooled variance for the two samples. b. Calculate the estimated standard error for the sample mean difference. c. If the sample mean difference is 10 points, is this enough to reject the null hypothesis using a two-tailed test with α = .05 ?

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Statistics for The Behavioral Scie...

10th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781305504912
BuyFind

Statistics for The Behavioral Scie...

10th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781305504912

Solutions

Chapter
Section
Chapter 10, Problem 6P
Textbook Problem

Two separate samples receive different treatments. After treatment, the first sample has n = 9 with S S = 462 , and the second has n = 7 with S S = 420 .

a. Compute the pooled variance for the two samples.

b. Calculate the estimated standard error for the sample mean difference.

c. If the sample mean difference is 10 points, is this enough to reject the null hypothesis using a two-tailed test with α = .05 ?

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