A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances. $$\begin{array} { l c }
\text { Unpaid Balance } & \text { Frequency } \
10 - 29 & 1 \
30 - 49 & 6 \
50 - 69 & 9 \
70 - 89 & 11 \
90 - 109 & 13
\end{array}$$
a.
Determine the mean unpaid balance.
b.
Determine the variance.
c.
Determine the standard deviation.
d.
Compute the coefficient of variation.

Question

A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances. $$\begin{array} { l c } 
\text { Unpaid Balance } & \text { Frequency } \
10 - 29 & 1 \
30 - 49 & 6 \
50 - 69 & 9 \
70 - 89 & 11 \
90 - 109 & 13
\end{array}$$ ​ 
a.
Determine the mean unpaid balance.
b.
Determine the variance.
c.
Determine the standard deviation.
d.
Compute the coefficient of variation.

Quizplus · Accepted Answer

The Answer of A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances. $$\begin{array} { l c } 
\text { Unpaid Balance } & \text { Frequency } \
10 - 29 & 1 \
30 - 49 & 6 \
50 - 69 & 9 \
70 - 89 & 11 \
90 - 109 & 13
\end{array}$$ ​ 
a.
Determine the mean unpaid balance.
b.
Determine the variance.
c.
Determine the standard deviation.
d.
Compute the coefficient of variation.

A Sample of Charge Accounts at a Local Drug Store