Test the Indicated Claim About the Means of Two Populations

Essay

Test the indicated claim about the means of two populations. Assume that the two samples are
independent simple random samples selected from normally distributed populations. Do not
assume that the population standard deviations are equal. A researcher wishes to determine
whether people with high blood pressure can reduce their blood pressure, measured in mm Hg,
by following a particular diet. Use a significance level of 0.01 to test the claim that the treatment
group is from a population with a smaller mean than the control group. Include your null and
alternative hypotheses, the test statistic, P-value or critical value(s), conclusion about the null
hypothesis, and conclusion about the claim in your answer. $\begin{array}{|l|l|}\hline \text { Treatment Group } & {\text { Control Group }} \\\hline n_{1}=35 & n_{2}=75 \\\hline \bar{x}_{1}=189.1 & \bar{x}_{2}=203.7 \\\hline s_{1}=38.7 & s_{2}=39.2 \\\hline\end{array}$