The standard error of the mean for a sample of 100 is 25.In order to cut the standard error of the mean in half (to 12.5)we must:
A)increase the sample size to 200.
B)decrease the sample size to 50.
C)keep the sample size at 100 and change something else.
D)None of these choices.

Question

Quizplus · Accepted Answer

To cut the standard error in half, the sample size must be increased by a factor of four, not two. Therefore, increasing the sample size to 200 is not sufficient.

The Standard Error of the Mean for a Sample of 100