TABLE 12-14 A Perfume Manufacturer Is Trying to Choose Between 2 Magazine

Multiple Choice

TABLE 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.
-Referring to Table 12-14,the hypotheses that should be used are

A) H₀ : μ₁ = μ₂ versus H₁ : μ_{1 ≠} μ₂.
B) H₀ : μ₁ ≤ μ₂ versus H₁ : μ_{1 >} μ₂.
C) H₀ : M₁ = M₂ versus H₁ : M_{1 ≠} M₂.
D) H₀ : M₁ ≤ M₂ versus H₁ : M_{1 >} M₂.