The following information was obtained from matched samples taken from two populations. Assume the population of differences is normally distributed.
Individual
Method 1
Method 2
1
7
5
2
5
9
3
6
8
4
7
7
5
5
6
?
If the null hypothesis H0: ?d = 0 is tested at the 5% level,
A. the null hypothesis should be rejected.
B. the null hypothesis should not be rejected.
C. the alternative hypothesis should be revised.
D. the null hypothesis should be revised.
Answer: B
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