Consider the Frequency Distribution of the Scores of 25 Examinees

Multiple Choice

Consider the frequency distribution of the scores of 25 examinees on a 50-item test:

$\begin{array}{lc}\hline \text {Test Score Interval }&\text { Number of Examinees }\\\hline96-100 & 4 \\ 91-95 & 6 \\ 86-90 & 8 \\81-85 & 5 \\76-80 & 2 \\\hline\end{array}$
-The above standard deviation of the distribution of scores is approximately

A) 3.0.
B) 6.0.
C) 12.0.
D) 36.0.