Model
a Consumer Group Is Testing the Gas Mileage of 3

Essay

Model
A consumer group is testing the gas mileage of 3 different models of cars.Several cars were driven 1000 miles and the gas mileage was recorded in the following table.
$$\begin{array} { | c | c | c } \hline \text { Madel 1 } & \text { Model 2 } & \text { Madel 3 } \\\hline 22.6 & 19.6 & 25.3 \\\hline 20.9 & 22.3 & 21.6 \\\hline 23.6 & 20.5 & 20.5 \\\hline 21.9 & 17.0 & 24.6 \\\hline 22.0 & 17.6 & 22.7 \\\hline 21.1 & 19.2 & 20.5 \\\hline 18.7 & & 20.9 \\\hline\end{array}$$
-Using $\alpha$ = 0.05,state the decision rule in terms of the critical value.