Which of the Following Statements Is True

Short Answer

Which of the following statements is true? $\begin{array}{|l|l|}\hline A&\text {When approximating the sample mean for grouped data we assume that the midpoint of each }\\&\text {class closely approximates the mean of observations in the class. }\\\hline B&\text { When approximating the sample mean for grouped data we cannot assume that the midpoin}\\&\text { of each class closely approximates the mean of observations in the class.}\\\hline C&\text { Descriptive measures for grouped data are not possible.}\\\hline D&\text { None of these choices are correct.}\\\hline \end{array}$