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

question 71

Essay

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 three brands have the same mean if the following sample results have
been obtained. $$\begin{array} { c c c } \text { Brand A } & \text { Brand B } & \text { Brand C } \\\hline 32 & 27 & 22 \\34 & 24 & 25 \\37 & 33 & 32 \\33 & 30 & 22 \\36 & & 21 \\39 & &\end{array}$$

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Definitions:

Variable Costs

Costs that vary directly with the level of production or output, such as materials and labor costs.

Japanese Firms

Companies based in Japan, often characterized by unique business practices such as lifetime employment and strong government-industry cooperation.

Marginal Revenue

The additional income generated from selling one more unit of a product or service.

Marginal Costs

The supplementary expense incurred from making one more unit of a product or service.