Consider the Data in the Following Frequency Distribution For the Above Data, Compute the Following

Essay

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