The following information was obtained from independent random samples taken of two populations. Assume normally distributed populations with equal variances.
The point estimate for the difference between the means of the two populations is
A) 0.
B) -3.
C) 3.
D) 15.

Question

The following information was obtained from independent random samples taken of two populations. Assume normally distributed populations with equal variances.  ​
The point estimate for the difference between the means of the two populations is
A) 0. 
B) -3. 
C) 3. 
D) 15.

Quizplus · Accepted Answer

The point estimate for the difference between the means of two populations is given by:

(point estimate) = (mean of sample 1) - (mean of sample 2)

From the given information, we can see that the mean of sample 1 is 22 and the mean of sample 2 is 19. Therefore, the point estimate is:

(point estimate) = 22 - 19 = 3

Therefore, the best choice is C) 3.

The Following Information Was Obtained from Independent Random Samples Taken