Refer to Exercise 8.4.9. Calculate the exact P-value of the data as analyzed by the sign test.
Exercise 8.4.9
The study described in Example 8.1.1, involving the compound mCPP, included a group of men. The men were asked to rate how hungry they were at the end of each 2-week period and differences were computed (hunger rating when taking mCPP minus hunger rating when taking the placebo). The distribution of the differences was not normal. Nonetheless, a sign can be conducted using the following information: Out of eight men who recorded hunger ratings, three reported greater hunger on mCPP than on the placebo and five reported lower hunger on mCPP than on the placebo.1 Conduct a sign test at the α = 0.10 level; use a non directional alternative.