At the 0025 Significance Level, Test the Claim That the Four Brands

Essay

At the 0.025 significance level, test the claim that the four brands have the same mean if the following sample results have been obtained.
$\begin{array} { l } \text { Brand A}&\text { Brand B}&\text { Brand C }&\text { Brand D }\\\hline17&18&21&22\\20&18&24&25\\21&23&25&27\\22&25&26&29\\21&26&29&35\\&&29&36\\&&&37\end{array}$