SOLUTION: In the situation of Problem 1 above, suppose that two independent random samples from approximately normal distributions were taken from recent college graduates of the California

Question 1040456: In the situation of Problem 1 above, suppose that two independent random samples from approximately normal distributions were taken from recent college graduates of the California public university system. As before, we let M1 represent the average time it takes females to complete a baccalaureate degree in the California public university system, and we let M2 represent the average time it takes males to complete a baccalaureate degree in the California public university system.
Using the summary data below from the two samples, compute the value of the test statistic t∗.
x1�=4.95 x2�=5.22
s1=0.64 s2=0.89
n1=21 n2=21
Select one:
A. -1.78
B. -1.59
C. -1.13
D. -1.00
E. -0.84
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
It is the difference in means, x1-x2, or- 0.27
divided by sqrt{(0.64^2/21)+(0.89^2/21)}
The denominator is sqrt{0.0195+0.0377}=0.2392
-0.27/0.2392=-1.13
C
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