Which of the Following Must Is Necessary When Approximating Descriptive

Short Answer

Which of the following must is necessary when approximating descriptive measures for grouped data? $\begin{array}{|l|l|}\hline A&\text {The observations in a class are positively skewed. }\\\hline B&\text {The observations in a class are fairly symmetrical about the midpoint. }\\\hline C&\text { The observations in a class are negatively skewed.}\\\hline D&\text {None of these choices are correct. }\\\hline \end{array}$