91Ó°ÊÓ

You work for a marketing firm, and you're working on a new television commercial aimed towards women. You've been given the task of designing an experiment to compare the effectiveness of three different commercial versions. Each subject will be shown one of the three versions of the product and then asked to express her feelings about it. You believe there are significant variations in the responses of working and unemployed women.

Since d and e are not designs, but rather sampling techniques, they can be deleted. Because there are only two levels of treatment, a matched pair design is utilised. Because it is not a matched pair design, answer c is not required to be considered. There are more than one element, thus the b isn't taken into account. Completely randomised design and randomised block design are the remaining options. The answer is randomised block design, because this design wishes to take that into account.

As a result, the best solution is (a)

Option 'b' a completely randomized design is not the correct answer.

Option 'c' a matched pairs design is not the correct answer.

Option 'd' a simple random sample is not the correct answer.

Option'e' a stratified random sample is not the correct answer.