Use the Data in the Given Table and the Corresponding

question 7

Essay

Use the data in the given table and the corresponding Minitab display to test the hypothesis. The following table shows the mileage for four different cars and three different brands of
gas. Assuming no effect from the interaction between car and brand of gas, test the claim that
the three brands of gas provide the same mean gas mileage. Use a 0.05 significance level. $\begin{array}{l}\begin{array} { l | l l l } & \text { Brand 1 } & \text { Brand 2 } & \text { Brand 3 } \\\hline \text { Car 1 } & 22.4 & 25.2 & 24.3 \\\text { Car 2 } & 19 & 18.6 & 19.8 \\\text { Car 3 } & 24.6 & 25 & 25.4 \\\text { Car 4 } & 23.5 & 23.6 & 24.1\end{array}\\\begin{array} { l r r r r c } \text { Source } & \text { DF } & \text { SS } &{ \text { MS } } & \text { F } & \text { p } \\\text { Car } & 3 & 61.249 & 20.416 & 39.033 & 0.000249 \\\text { Gas } & 2 & 2.222 & 1.111 & 2.124 & 0.200726 \\\text { Error } & 6 & 3.138 & 0.523 & & \\\text { Total } & 11 & 66.609 & & &\end{array}\end{array}$

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Definitions:

Finished Goods Inventory

Finished goods inventory consists of items that have completed the manufacturing process and are ready to be sold to customers, representing a final stage in product inventory.

Weighted-Average Method

An inventory costing method that assigns a weighted average cost to each unit of inventory, based on the cost of goods available for sale and the number of units available.

Equivalent Units

Equivalent units are a concept in cost accounting used to assign costs to partially completed goods, converting them into the amount of finished goods units they represent.

Direct Materials Cost

The expenditure on raw materials that are directly involved in the production of a good or service.