Gashol (A Mixture of Gasoline and Methyl Alcohol)sales in Iowa

question 81

Essay

Gashol (a mixture of gasoline and methyl alcohol)sales in Iowa City have been recorded over the past 10 months as shown below:
$$\begin{array} { | c | c | c | c | c | c | c | c | c | c | c | } \hline \text { Manth } & \text { Jan } & \text { Feb } & \text { Mar } & \text { Apr } & \text { May } & \text { June } & \text { Juy } & \text { Aug } & \text { Sep } & \text { Oct } \\\hline \text { Sales } & 75 & 72 & 81 & 92 & 90 & 105 & 112 & 107 & 110 & 93 \\\hline\end{array}$$
-Compute the four month centered moving average.

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Definitions:

Productivity

A measure of the efficiency of production, often assessed as the ratio of outputs to inputs in a production process.

Consumer Price Index

A measure that examines the weighted average of prices of a basket of consumer goods and services, often used as an indicator of inflation.

Pretzels

A type of baked bread product made from dough most commonly shaped into a twisted knot.

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