A Researcher Wishes to Test the Effectiveness of a Flu

question 20

Essay

A researcher wishes to test the effectiveness of a flu vaccination. 150 people are vaccinated, 180 people are vaccinated with a placebo, and 100 people are not vaccinated. The number in each group who later caught the flu was recorded. The results are shown below. $$\begin{array} { r | r r r } & \text { Vaccinated } & \text { Placebo } & \text { Control } \\\hline \text { Caught the flu } & 8 & 19 & 21 \\\text { Did not catch the flu } & 142 & 161 & 79\end{array}$$ Use a 0.05 significance level to test the claim that the proportion of people catching the flu is the same in all three groups.

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Definitions:

Heterosexism

A belief system that values heterosexual orientation as superior, often leading to discrimination against non-heterosexual individuals.

Gay Men

Men who are romantically and sexually attracted to other men.

Lesbians

Lesbians are women who are romantically and sexually attracted to other women.

Sexual Abuse

Enduring or forcing unwanted sexual activity by one person on another, often exerting power and control over the victim.