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
?
The 98% confidence interval for the difference between the two population means is
A. -3.776 to 1.776.
B. -4.747 to 2.747.
C. -1.776 to 2.776.
D. -4.747 to 1.776.
Answer: B
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