The following is a partial relative frequency distribution of grades in an introductory statistics course. $\begin{array}{|l|c|}
\hline \text { Grade } & \text { Relative Frequency } \
\hline \text { A } & .22 \
\hline \text { B } & ? \
\hline \text { C } & .18 \
\hline \text { D } & .17 \
\hline \text { F } & .06 \
\hline
\end{array}$
Find the relative frequency for the B grade.
A).78
B).27
C).65
D).37
E).47

Question

Quizplus · Accepted Answer

The sum of all relative frequencies must equal 1. Thus, .22 + .18 + .17 + .06 + B = 1. Solving for B gives B = .37.

The Following Is a Partial Relative Frequency Distribution of Grades