Question

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. All of the above answers are correct.
e. None of the above answers is correct.

Answer 1

a. data values are treated as if they occur at the midpoint of a class

Answer 2

a. The data values are treated as if they occur at the midpoint of a class.