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.

Question

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.

Quizplus · Accepted Answer

The standard deviation is a measure of the spread of the data. A smaller standard deviation indicates that the data is more clustered around the mean, while a larger standard deviation indicates that the data is more spread out. In this case, the standard deviation is approximately 3.0, which indicates that the data is relatively clustered around the mean.

Consider the Frequency Distribution of the Scores of 25 Examinees