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. $\begin{array}{r|ccc}
& \text { Vaccinated } & \text { Placebo } & \text { Control } \
\hline \text { Caught the flu } & 8 & 19 & 21 \
\text { Did not catch the flu } & 142 & 161 & 79
\end{array}$ Are the proportions of people catching the flu the same in all three groups? Use a 1% level of significance.

Question

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. $\begin{array}{r|ccc} 
& \text { Vaccinated } & \text { Placebo } & \text { Control } \
\hline \text { Caught the flu } & 8 & 19 & 21 \
\text { Did not catch the flu } & 142 & 161 & 79
\end{array}$ Are the proportions of people catching the flu the same in all three groups? Use a 1% level of significance.

Quizplus · Accepted Answer

The Answer of 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. $\begin{array}{r|ccc} 
& \text { Vaccinated } & \text { Placebo } & \text { Control } \
\hline \text { Caught the flu } & 8 & 19 & 21 \
\text { Did not catch the flu } & 142 & 161 & 79
\end{array}$ Are the proportions of people catching the flu the same in all three groups? Use a 1% level of significance.

A Researcher Wishes to Test the Effectiveness of a Flu