Question

en randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below.

Person	A	B	C	D	E	F	G	H	I	J
Test A	71	119	104	100	108	127	83	97	94	92
Test B	72	119	110	105	106	130	85	100	92	91

1. Consider (Test A - Test B). Use a 0.050.05 significance level to test the claim that people do better on the second test than they do on the first. (Note: You may wish to use software.)

(a) What test method should be used?

A. Two Sample t
B. Two Sample z
C. Matched Pairs

(b) The test statistic is

(c) The critical value is

(d) Is there sufficient evidence to support the claim that people do better on the second test?

A. Yes
B. No


2. Construct a 9595% confidence interval for the mean of the differences. Again, use (Test A - Test B).
<μ<<μ<

Answer 1