If the sample size is held constant,which of the following will produce the widest 90% confidence interval for the population mean difference for a repeated-measures study?
A)MD = 5 with s2 = 5 for the difference scores
B)MD = 5 with s2 = 10 for the difference scores
C)MD = 3 with s2 = 10 for the difference scores
D)MD = 3 with s2 = 20 for the difference scores

Question

Quizplus · Accepted Answer

The wider the variance (s2), the wider the confidence interval. Therefore, option D with MD = 3 and s2 = 20 will produce the widest 90% confidence interval.

If the Sample Size Is Held Constant,which of the Following