The Following Table Entries Are the Times in Seconds for Three

question 17

Essay

The following table entries are the times in seconds for three different drivers racing on four different tracks. Assuming no effect from the interaction between driver and track, test the claim that the three drivers have the same mean time. Use a 0.05 significance level. $\begin{array}{c|cccc} & \text { Track 1 } & \text { Track 2 } & \text { Track 3 } & \text { Track 4 } \\\hline \text { Driver 1 } & 72 & 70 & 68 & 71 \\\text { Driver 2 } & 74 & 71 & 66 & 72 \\\text { Driver 3 } & 76 & 69 & 64 & 70\end{array}$
$$\begin{array} { l r c l r c } \text { Source } & \text { DF } & \text { SS } & \text { MS } & \text { F } & \text { p } \\\text { Driver } & 2 & 2 & 1 & 0.33 & 0.729 \\\text { Track } & 3 & 98.25 & 32.75 & 10.92 & 0.00763 \\\text { Error } & 6 & 18 & 3 & & \\\text { Total } & 11 & 118.25 & & &\end{array}$$

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Definitions:

Cost of Goods Sold

Direct spending associated with producing the merchandise a company trades, including both materials and manpower costs.

Worksheet

A columnar device used by accountants to aid them in completing the accounting cycle—often just referred to as "spreadsheet." It is not a formal report.

Revenue

The total income received by a company from its normal business activities, before any expenses are subtracted.