Which of the following must is necessary when approximating descriptive measures for grouped data?
A)The observations in a class are positively skewed.
B)The observations in a class are fairly symmetrical about the midpoint.
C)The observations in a class are negatively skewed.
D)None of these choices are correct.

Question

Quizplus · Accepted Answer

When approximating descriptive measures for grouped data, it is necessary for the observations in a class to be fairly symmetrical about the midpoint. This is because measures like the mean and median are based on the assumption of symmetry, and when the data is skewed, these measures may not accurately represent the center of the data. Positive or negative skewness can also affect the accuracy of measures like the mode. Therefore, choice B is the best answer.

Which of the Following Must Is Necessary When Approximating Descriptive