The Following Frequency Distribution Shows the Time in Minutes) That $$\begin{array} { c c } \text { Time } & \text { Frequency } \\20-39 & 2 \\40-59 & 4 \\60-79 & 6 \\80-99 & 4 \\100-119 & 2\end{array}$$

Short Answer

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.