Which of the following could be one possible reason for performing a paired-difference experiment?
A) to reduce the degrees of freedom
B) to allow one to use a larger value of $\alpha$
C) to reduce the quantity of information in the experiment
D) to reduce the variability in the sample data

Question

Quizplus · Accepted Answer

Performing a paired-difference experiment can help reduce the variability in the sample data by controlling for individual differences between subjects, which can lead to more precise estimates of treatment effects.

Which of the Following Could Be One Possible Reason for Performing