SCENARIO 12-14
a Perfume Manufacturer Is Trying to Choose Between $\neq$

SCENARIO 12-14
A perfume manufacturer is trying to choose between 2 magazine advertising layouts.An expensive layout would include a small package of the perfume.A cheaper layout would include a "scratch- and-sniff" sample of the product.The manufacturer would use the more expensive layout only if there is evidence that it would lead to a higher approval rate.The manufacturer presents the more expensive layout to 4 groups and determines the approval rating for each group.He presents the "scratch-and-sniff" layout to 5 groups and again determines the approval rating of the perfume for each group.The data are given below.Use this to test the appropriate hypotheses with the Wilcoxon Rank Sum Test with a level of significance of 0.05.

12-34 Chi-Square and Nonparametric Tests
-Referring to Scenario 12-14,the hypotheses that should be used are:

A) H₀ : ?₁ = ?₂ versus H₁ : ?₁ $\neq$ ?₂
B) H₀ : ?₁ $\le$ ?₂ versus H₁ : ?₁ $\gt$ ?₂
C) H₀ : M₁ = M₂ versus H₁ : M₁ $\neq$ M₂
D) H₀ : M₁ $\le$ M₂ versus H₁ : M₁ $\gt$ M₂