A Company Counted the Number of All of Their Employees

Essay

A company counted the number of all of their employees in each of the following age classes.According to this distribution,what is the standard deviation for the age of the employees in the company?
$$\begin{array} { | c | c | } \hline \text { Age Range } & \text { Number of Emplayees } \\\hline 20 - 24 & 8 \\\hline 25 - 29 & 37 \\\hline 30 - 34 & 25 \\\hline 35 - 39 & 48 \\\hline 40 - 44 & 27 \\\hline 45 - 49 & 10 \\\hline\end{array}$$