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

question 26

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. $\begin{array}{llll}\text { brandA }&\text {brand B }&\text {brand C }&\text {brand D }\\\hline17 & 18 & 21 & 22 \\20 & 18 & 24 & 25 \\21 & 23 & 25 & 27 \\22 & 25 & 26 & 29 \\21 & 26 & 29 & 35 \\& & 29 & 36 \\& & & 37\end{array}$

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Definitions:

Aggregate Demand

The total demand for all goods and services within an economy at various price levels, during a specific time period.

AD1 to AD2

Represents a shift from one aggregate demand curve to another in macroeconomic models, indicating changes in the total demand for goods and services in an economy.

Aggregate Demand

The gross requirement for products and services within an economy, priced at an overall level over a certain timeframe.

AD4 to AD5

No specific universally recognized definition; possibly refers to a shift or movement from one aggregate demand curve (AD4) to another (AD5) in economics.