You investigate whether the older or younger male in pairs of brothers tends to be more...

You investigate whether the older or younger male in pairs of brothers tends to be more extroverted. You obtain the following extroversion scores:

Sample 1 (Younger)	Sample 2 (Older)
10	18
11	17
18	19
12	16
15	15
13	19
19	13
15	20

(a) What are H0 and Ha? (b) Compute tobt. (c) With ? 5 .05, what is tcrit? (d)compute the 95% confidence interval for the mean difference

Expert Solution

orchestra answered 2 years ago

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