Astudy was designed to assess the impact of sun exposure on skin damage in beach volleyball players. at the beginning of a three-day long tournament, a total of 200 players were enrolled in the study. throughout the tournament, 130 players wore waterproof spf-35 sunscreen (usually recommended by dermatologists) while 70 players did not wear any sunscreen. at the end of the volleyball tournament, players' skin was analyzed for texture, sun damage, and burns. total 20 new cases of sun damage were diagnosed, among which 10 cases were from the group of players who wore spf-35 sunscreen, and 10 cases were from the group who did not wear any sunscreen. calculate and interpret the appropriate measure of association between use of sunscreen and sun damage.