In computing descriptive statistics from grouped data,
A) data values are treated as if they occur at the midpoint of a class.
B) the grouped data result is more accurate than the ungrouped result.
C) the grouped data computations are used only when a population is being analyzed.
D) none of these alternatives is correct.

Question

Quizplus · Accepted Answer

In computing descriptive statistics from grouped data, data values are treated as if they occur at the midpoint of a class. This is known as the midpoint approximation method. The grouped data result may not always be more accurate than the ungrouped result, but it is often more manageable for large data sets. Grouped data computations can be used for both sample and population analysis.

In Computing Descriptive Statistics from Grouped Data