Question

A stripper who is interested in testing the relationship between butt size and short term memory administered a test to 10 subjects prior to a stressful situation and then retested them after the stress situation.

Subject           1          2          3          4          5          6          7            8          9          10

Before             13        15        9          13        15        17        13 16        11        13

After                10        14        7          15        11        14        13            14        9          14

Obtain a 98% confidence interval for the difference between the means of the two short term memories. Based on the above data can we conclude that the but size situation decreases one’s performance on a test that measures memory?

Answer 1

Answer:

Given Data

A stripper who is interested in testing the relationship between butt size and short term memory administered a test to 10 subjects prior to a stressful situation and then retested them after the stress situation.

Let d = before - after

Following table shows the calculations :

Before	After
13	10	3	2.56
15	14	1	0.16
9	7	2	0.36
13	15	-2	11.56
15	11	4	6.76
17	14	3	2.56
13	13	0	1.96
16	14	2	0.36
11	9	2	0.36
13	14	-1	5.76
Total		14	32.4

Since confidence interval contains zero so there is no evidence that the stress situation decreases one's performance on a test that measures memory.

Please like it...