Find Each Value Requested for the Set of Scores in the Following

question 50

Short Answer

Find each value requested for the set of scores in the following frequency distribution table.
$$\begin{array} { c c } X & f \\\hline 5 & 2 \\4 & 2 \\3 & 3 \\2 & 5 \\1 & 2\end{array}$$
a.N
b.ΣX
c.ΣX²