The Following Is a Frequency Distribution for the Ages of a Sample

Short Answer

The following is a frequency distribution for the ages of a sample of employees at a local company.
$\begin{array}{cc} \text { Age }& \text { Frequency } \\30-39 & 2 \\40-49 & 3 \\50-59 & 7 \\60-69 & 5 \\70-79 & 1\end{array}$
a. Determine the average age for the sample.
b. Compute the variance.
c. Compute the standard deviation.
d. Compute the coefficient of variation.