In Order to Compare the Life Expectancies of Three Different

Essay

In order to compare the life expectancies of three different brands of tires, ten tires of each brand were randomly selected and were subjected to standard wear testing procedures. Information regarding the three brands is shown below.
$\begin{array}{ccc}&\text { Brand A }&\text { Brand B }&\text { Brand C }\\\text { Average mileage in } 1000 \text { miles) }&37 & 38 & 33 \\\text { Sample variance }&3 & 4 & 2\end{array}$ Use the above data and test to see if the mean mileage for all three brands of tires is the same. Let α = 0.05. Use both the critical value and p-value approaches.