A Medical Researcher Wishes to Try Three Different Techniques to Lower

question 22

Essay

A medical researcher wishes to try three different techniques to lower blood pressure of patients with high blood pressure. The subjects are randomly selected and assigned to one of three groups. Group 1 is given medication, Group 2 is assigned an exercise program and Group 3 is assigned a dietary regimen. At the end of six weeks, the reduction in each subject's blood pressure is recorded. The results (in $\mathrm { mmHg }$ ) are shown in the table. Use the Kruskal-Wallis H-test to test whether the distributions of the blood pressure reductions differ among the three groups. Be sure to specify the null and alternative hypotheses. Use $\alpha = 0.05$ .

$\begin{array}{c|c|c}\text { Group 1 } & \text { Group 2 } & \text { Group 3 } \\\hline 14 & 11 & 9 \\15 & 8 & 15 \\12 & 5 & 7 \\18 & 6 & 11 \\16 & 7 & 12 \\11 & 3 & 7\end{array}$

---

Definitions:

Investee Net Income

The portion of net income earned by a company that is attributed to minority investors.

Dividend Revenue

Income received from investments in the form of dividends, typically from shares of stock held in another company.

Cost Method

An accounting approach used to record investments, where the investment is recorded at its acquisition cost without recognizing interim income or losses.

Long-Term Investment

An asset that a company intends to hold for more than one year for the purpose of generating revenue.