A Random Sample of Size 24 Is Drawn from a Continuous

Multiple Choice

A random sample of size 24 is drawn from a continuous and symmetric probability distribution with mean $\mu .$ In testing $H _ { \Delta } : \mu = 200 \text { versus } H _ { \pm } : \mu \neq 200$ it can be shown that the Wilcoxon signed-rank test statistic $S _ { + }$ has approximately a normal distribution with mean and standard deviation given, respectively, by

A) 150 and 35
B) 25 and 300
C) 150 and 300
D) 35 and 25
E) 25 and 35