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 find out 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