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

question 37

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 four brands
have the same mean if the following sample results have been obtained. $$\begin{array} { c c c c } \text { Brand A } & \text { Brand B } & \text { Brand C } & \text { Brand D } \\\hline 17 & 18 & 21 & 22 \\20 & 18 & 24 & 25 \\21 & 23 & 25 & 27 \\22 & 25 & 26 & 29 \\21 & 26 & 29 & 35 \\& & 29 & 36 \\& & & 37\end{array}$$

---

Definitions:

Annual Fixed Costs

The total of all business expenses that are constant and do not change with the level of goods or services produced within a given time period, typically a year.

Cash Break-Even

The point at which a business generates just enough cash flow to cover its operating expenses, not accounting for any profitability.

Selling Price

The amount of money a buyer pays to purchase a product or service.

Variable Costs

Expenditures that fluctuate relative to the quantity of output or services provided by a business.