In: Statistics and Probability
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