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The Frequency Distribution Below Shows the Monthly Expenditure on Gasoline

Question 7

Short Answer

The frequency distribution below shows the monthly expenditure on gasoline for a sample of 14 individuals.
 Expenditure  Frequency 55−59260−64365−69470−74375−792\begin{array} { c c } \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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