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