In an attempt to determine how many consultants are needed t

In an attempt to determine how many consultants are needed to answer questions of users at a computer center, these data are collected on X, the time in minutes required to answer a telephone inquiry:

1.5 1.0 5.0 1.9 3.0 1.3 2.1 1.7 6.5 4.2 6.3 5.6 5.1 2.5 6.9

(A) What is E[W]?

(B) Based on the signed-rank test, can we conclude that the median time required is less than 5 minutes? Explain, based on the P vaule of your test. (A zero score should be given the lowest rank and should be assigned the algebraic sign least conducive to rejecting the null hypothesis)

Solution