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

Multiple Choice

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) ​M_D = 5 with s² = 5 for the difference scores
B) ​M_D = 5 with s² = 10 for the difference scores
C) ​M_D = 3 with s² = 10 for the difference scores
D) ​M_D = 3 with s² = 20 for the difference scores