The following frequency distribution shows the time in minutes) that a sample of students uses the computer terminals per day.
$$\begin{array} { c c }
\text { Time } & \text { Frequency } \
20-39 & 2 \
40-59 & 4 \
60-79 & 6 \
80-99 & 4 \
100-119 & 2
\end{array}$$
a. Compute the mean.
b. Compute the variance.
c. Compute the standard deviation.
d. Compute the coefficient of variation.

Question

The following frequency distribution shows the time in minutes) that a sample of students uses the computer terminals per day.
 $$\begin{array} { c c } 
\text { Time } & \text { Frequency } \
20-39 & 2 \
40-59 & 4 \
60-79 & 6 \
80-99 & 4 \
100-119 & 2
\end{array}$$ 
a. Compute the mean.
b. Compute the variance.
c. Compute the standard deviation.
d. Compute the coefficient of variation.

Quizplus · Accepted Answer

The Answer of The following frequency distribution shows the time in minutes) that a sample of students uses the computer terminals per day.
 $$\begin{array} { c c } 
\text { Time } & \text { Frequency } \
20-39 & 2 \
40-59 & 4 \
60-79 & 6 \
80-99 & 4 \
100-119 & 2
\end{array}$$ 
a. Compute the mean.
b. Compute the variance.
c. Compute the standard deviation.
d. Compute the coefficient of variation.