Which of the following statements is true?
A)When approximating the sample mean for grouped data we assume that the mid-point of each class closely approximates the mean of observations in the class.
B)When approximating the sample mean for grouped data we cannot assume that the midpoint of each class closely approximates the mean of observations in the class.
C)Descriptive measures for grouped data are not possible.
D)None of these choices are correct.

Question

Quizplus · Accepted Answer

When approximating the sample mean for grouped data, we assume that the mid-point of each class closely approximates the mean of observations in the class because the midpoint represents the center of the class and is a reasonable approximation of the average of the observations within that class.

Which of the Following Statements Is True