Question

Researchers at a pharmaceutical company are developing a new formula for their sunscreen. They want to see if the new formula provides better protection against sunburns than the formula that is already on the market. They apply the new formula to one arm of an individual and the old formula to the other arm, randomly choosing the arms for each formula. They then compare the color difference between the arms. What subjects define the "pairs" in this paired-samples design?

Answer 1

The correct answer would be, The arms of the individuals.

Then they compare the color difference between the arms. The arms of the individuals define the pairs in this paired samples design.

Explanation:

In the given question, the current sunscreen is to be compared with the old sunscreen, then pairs would have to be made to check the results of both sunscreens. So Paired sample design methodology is being used.

Paired sample designs are the designs consisted of samples in which natural coupling occurs. Paired Samples are also called the Dependent Samples.

Because the results of one variable is dependent on the result of other variable and vice versa, it means both variables are dependent upon the results of each other.

Random sample of people's arm will show the difference between the results of old and new sunscreens.

Learn more about Research Methodology at:

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