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The Frequency Distribution Below Shows the Monthly Expenditure on Gasoline

Question 68

Essay

The frequency distribution below shows the monthly expenditure on gasoline for a sample of 14 individuals.  Expenditure  Frequency 5559260643656947074375792\begin{array} { l l } \text { Expenditure } & \text { Frequency } \\55 - 59 & 2 \\60 - 64 & 3 \\65 - 69 & 4 \\70 - 74 & 3 \\75 - 79 & 2\end{array}
a.
Compute the mean.
b.
Compute the standard deviation.

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