The following is a frequency distribution of grades of a sample of statistics examinations. $$\begin{array} { l c }
\text { Grade } & \text { Frequency } \
50 - 59 & 7 \
60 - 69 & 10 \
70 - 79 & 22 \
80 - 89 & 15 \
90 - 99 & 6
\end{array}$$ Compute the following measures:
a.
The mean
b.
The variance
c.
The standard deviation
d.
The coefficient of variation

Question

The following is a frequency distribution of grades of a sample of statistics examinations. $$\begin{array} { l c } 
\text { Grade } & \text { Frequency } \
50 - 59 & 7 \
60 - 69 & 10 \
70 - 79 & 22 \
80 - 89 & 15 \
90 - 99 & 6
\end{array}$$ Compute the following measures: 
a.
The mean
b.
The variance
c.
The standard deviation
d.
The coefficient of variation

Quizplus · Accepted Answer

The Answer of The following is a frequency distribution of grades of a sample of statistics examinations. $$\begin{array} { l c } 
\text { Grade } & \text { Frequency } \
50 - 59 & 7 \
60 - 69 & 10 \
70 - 79 & 22 \
80 - 89 & 15 \
90 - 99 & 6
\end{array}$$ Compute the following measures: 
a.
The mean
b.
The variance
c.
The standard deviation
d.
The coefficient of variation

The Following Is a Frequency Distribution of Grades of a Sample