Test the claim that the samples come from populations with the same mean. Assume that the populations are normally distributed with the same variance. 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.
$\begin{array}{cccc}
\text { Brand A } & \text { Brand B } & \text { Brand C } & \text { Brand D } \
\hline 17 & 18 & 21 & 22 \
20 & 18 & 24 & 25 \
21 & 23 & 25 & 27 \
22 & 25 & 26 & 29 \
21 & 26 & 29 & 35 \
& & 29 & 36 \
& & & 37
\end{array}$

Question

Quizplus · Accepted Answer

The Answer of Test the claim that the samples come from populations with the same mean. Assume that the populations are normally distributed with the same variance. 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.
$\begin{array}{cccc}
\text { Brand A } & \text { Brand B } & \text { Brand C } & \text { Brand D } \
\hline 17 & 18 & 21 & 22 \
20 & 18 & 24 & 25 \
21 & 23 & 25 & 27 \
22 & 25 & 26 & 29 \
21 & 26 & 29 & 35 \
& & 29 & 36 \
& & & 37
\end{array}$

Test the Claim That the Samples Come from Populations with the Same