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Find the test statistic value for two mean tests in large sample.
A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. At α = .05, what is the test value?
Women
Men
Sample size
40
70
Mean effect
7
6.75
Sample variance
2.5
4.5
a. 0.70
b. 1.97
c. 0.36
d. 1.42
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