A study in Sweden looked at former elite soccer players; people who had played soccer, but not at the elite level; and people of the same age who did not play soccer. Here is a two-way table that classifies these subjects based on whether they had arthritis of the hip or knee by their mid-fifties:
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$$\begin{array} { | l | l | l | l | }
\hline & \text { Elite } & \text { Non-elite } & \text { Did not play } \
\hline \text { Arthritis } & 10 & 9 & 24 \
\hline \text { No arthritis } & 61 & 206 & 548 \
\hline
\end{array}$$ Among the former elite soccer players, what proportion had arthritis of the hip or knee?

Question

A study in Sweden looked at former elite soccer players; people who had played soccer, but not at the elite level; and people of the same age who did not play soccer. Here is a two-way table that classifies these subjects based on whether they had arthritis of the hip or knee by their mid-fifties:
?
?
$$\begin{array} { | l | l | l | l | } 
\hline & \text { Elite } & \text { Non-elite } & \text { Did not play } \
\hline \text { Arthritis } & 10 & 9 & 24 \
\hline \text { No arthritis } & 61 & 206 & 548 \
\hline
\end{array}$$ Among the former elite soccer players, what proportion had arthritis of the hip or knee?

Quizplus · Accepted Answer

The proportion of former elite soccer players with arthritis is $\frac{10}{10+61}= 0.141$.

A Study in Sweden Looked at Former Elite Soccer Players;