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A study was carried out and subjects were randomized to 2 groups:

Group A: control diet group, N=154
Group B: a fruit-and-vegetable group, N=154.

The 97.5% CI for mean changes in Group B minus mean change in Group A is (-4.7 to -0.9). Suppose we want to compute a two-sided p-value to compare the two groups. Without doing any further calculation, which statements must be false? (Note: The actual p-value may differ from all these values).

A) 0.01
B) 0.04
C) 0.02
D) 0.001

Please explain the reasoning behind the answer.

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Solution Summary

The expert examines the two sided p-value to compare Group A and Group B.

Solution Preview

B) must be false. By the 97.5% confidence interval, we know 0 is not in the CI, so if we use the same confidence ...

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