Consider the Data in the Following Frequency Distribution $\begin{array}{cc}\text { Class }&\text { Frequency }\\2-6 & 2 \\7-11 & 3 \\12-16 & 4 \\17-21 & 1\end{array}$

Short Answer

Consider the data in the following frequency distribution. Assume the data represent a population.
$\begin{array}{cc}\text { Class }&\text { Frequency }\\2-6 & 2 \\7-11 & 3 \\12-16 & 4 \\17-21 & 1\end{array}$ For the above data, compute the following.
a. The mean
b. The variance
c. The standard deviation