The rank sum statistic,W,is approximately _______ as long as the sample size of both SRSs is large.
A)Normal
B)Binomial
C)Uniform
D)None of the above.

Question

Quizplus · Accepted Answer

The rank sum statistic follows approximately a normal distribution as long as the sample size of both SRSs is large (i.e., n1 and n2 are both greater than or equal to 10). This is due to the central limit theorem, which states that the sum or average of a large number of independent and identically distributed random variables will approximately follow a normal distribution.

The Rank Sum Statistic,W,is Approximately _______ as Long as the Sample