A study conducted in the fall of 2003 found that 5 of 58, or 9%, of St. Louis Rams football players had methicillin-resistant Staphylococcus aureus (MRSA), a highly contagious infection of turf-abrasion wounds. Give two reasons why we should not use the data and a normal approximation to set up a confidence interval for the proportion of all football players with such infections.