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

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.

Quizplus · Accepted Answer

When approximating descriptive measures for grouped data, it is necessary that the observations in a class are fairly symmetrical about the midpoint. This is because measures such as the mean and median rely on the assumption of symmetry for an accurate estimate. Skewed data can lead to biased estimates of these measures. None of the other choices are necessary for approximating descriptive measures for grouped data.

Which of the Following Must Is Necessary When Approximating Descriptive