When computing the standard deviation from grouped data,we must assume that the scores are clustered at the ____ of the interval.
A)mode
B)lower real limit
C)upper real limit
D)midpoint

Question

Quizplus · Accepted Answer

The midpoint is the best choice because it represents the center of each interval and is the most representative value of the scores within that interval. Using the mode, lower or upper real limits would not provide an accurate representation of the data within the interval.

When Computing the Standard Deviation from Grouped Data,we Must Assume