A Medical Researcher Wishes to Try Three Different Techniques to Lower

question 40

Multiple Choice

A medical researcher wishes to try three different techniques to lower cholesterol levels of patients with highcholesterol levels. The subjects are randomly selected and assigned to one of three groups. Group 1 is givenmedication, Group 2 is given an exercise program, and Group 3 is assigned a diet program. At the end of sixweeks, each subjectʹs cholesterol level is recorded. Use α = 0.05. Which of the following is a correct statementabout the means? $$\begin{array} { c c c } \hline \text { Group 1 } & \text { Group 2 } & \text { Group 3 } \\\hline 13 & 8 & 6 \\12 & 5 & 12 \\9 & 2 & 4 \\15 & 3 & 4 \\11 & 4 & 9 \\8 & 0 & 8 \\\hline\end{array}$$

• A) The mean of Group 1 is not equal to the mean of Group 2.
• B) The mean of Group 1 is not equal to the mean of Group 3.
• C) The mean of Group 2 is not equal to the mean of Group 3.
• D) All of the means are not equal.

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Definitions:

Carcinoma

A type of cancer that starts in cells that make up the skin or tissue linings of organs.

Glioma

A type of tumor that occurs in the brain and spinal cord, originating from the glial cells.

Dedifferentiation

The process by which specialized cells lose their specialization during regeneration or in response to injury.

Differentiation

The process by which cells or tissue undergo a change toward a more specialized form or function.