To compute a mean for scores that have been grouped into a frequency distribution, we assume that the scores in each interval are________.
A) spread evenly across the interval.
B) twice the value of the next lower interval.
C) located at the lower real limit of the interval.
D) located at the midpoint of the interval.

Question

Quizplus · Accepted Answer

When computing mean for scores grouped into a frequency distribution, we assume that the scores in each interval are located at the midpoint of the interval. This is because the midpoint is the most representative score for that interval and using it results in a more accurate calculation of the mean.

To Compute a Mean for Scores That Have Been Grouped