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

question 35

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. $\begin{array} { l } \text { Brand A } &\text{Brand }\mathrm{B}& \text { Brand } \mathrm{C} &\text { Brand D }\\\hline15&20&21&15\\25&17&22&15\\21&22&20&14\\23&23&19&23\\22&&18&22\\20&&&28\\&&&28\end{array}$

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Definitions:

Alcohol

An organic compound characterized by one or more hydroxyl (-OH) groups attached to a carbon atom.

Urine Production

The process by which the kidneys filter the blood, removing waste products and excess substances to form urine.

Angiotensinogen

A glycoprotein produced by the liver that is the precursor to angiotensin, playing a key role in blood pressure regulation.

Angiotensin I

Peptide derived when renin acts on angiotensinogen.