Determine standard deviation and coefficient of variation

Reference no: EM13113155

A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances.

Unpaid Balance Frequency
10 - 29 1
30 - 49 6
50 - 69 9
70 - 89 11
90 - 109 13

a. Determine the mean unpaid balance.
b. Determine the variance.
c. Determine the standard deviation.
d. Compute the coefficient of variation.

Reference no: EM13113155

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