The percent of elite players who have arthritis is then the total number of elite players with arthritis divided by the number of elite players:

Percent of elite players who have arthritis \(\displaystyle=\frac{{10}}{{{10}+{61}}}=\frac{{10}}{{71}}\sim{0.1408}={14.08}\%\)

We note that 9 players were non-elite players with arthritis and 206 players were non-clite players with arthritis.

Percent of elite players who have arthritis =

The percent of non-elite players who have arthritis is then the total number of non-elite players with arthritis divided by the number of non-clite players:

We then note that the percent of elite players who have arthritis (14.08%) is much higher than the percent of non-elite players who have arthritis (4.186%), which confirms the suspicion that the more serious soccer players were more likely to develop arthritis later in life.