Instruction 19-3
a Perfume Manufacturer Is Trying to Choose Between $\begin{array}{cc}\text { Padkage } & \text { Scratch } \\\hline 52 & 37 \\68 & 43 \\43 & 53 \\48 & 39 \\56 & 47\end{array}$

question 20

Multiple Choice

Instruction 19-3
A perfume manufacturer is trying to choose between two 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 both layouts to five groups and determines the approval rating from each group on both layouts. The data are given below. Use this to test whether the median difference in approval rating is different from zero in favour of the more expensive layout with a level of significance of 0.05.
$\begin{array}{cc}\text { Padkage } & \text { Scratch } \\\hline 52 & 37 \\68 & 43 \\43 & 53 \\48 & 39 \\56 & 47\end{array}$

-Referring to Instruction 19-3,what is the appropriate test to use?

• A) Wilcoxon signed rank test for difference in median
• B) Wilcoxon signed rank test for median difference
• C) Wilcoxon rank sum test for median difference
• D) Wilcoxon rank sum test for difference in median

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Definitions:

Supply Curve

A visual chart depicting how the price of a product correlates with the amount of the product that sellers are prepared to offer.

Producing Gasoline

The process of refining crude oil into gasoline, involving several stages including distillation and chemical treatment.

Public Transportation

Public Transportation encompasses various modes of transport offered to the public, including buses, trains, and subways, aimed at facilitating mobility with reduced individual vehicle usage.

Demand Curve

A graphical representation of the relationship between the quantity of a good that consumers are willing and able to purchase and the price.