Bo Derek calculates that she needs a sample size of 200, given the estimated mean, accuracy variance nd required Z-score.However, she learns that the variance is actually one-half of what she originally believed.Her required sample size will now be
A)100
B)800
C)400
D)50
E)none of the above

Question

Quizplus · Accepted Answer

If the variance is halved, the sample size required is also halved, so the new sample size is 100.

Bo Derek Calculates That She Needs a Sample Size of 200