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

question 105

Multiple Choice

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

---

Definitions:

Lawrence Kohlberg

A psychologist best known for his theory of stages of moral development.

Reversibility

The understanding that certain operations or actions can be done and then undone, returning to the original state, a concept crucial in cognitive development.

Preoperational Stage

A developmental phase, posited by Jean Piaget, where children from ages 2 to 7 engage in symbolic play and struggle with logic and taking the perspective of others.

Egocentric

In cognitive development, the inability to differentiate between one’s own perspective and someone else’s perspective.