1 Staph Infections. A study investigated ways to prevent staph infections in surgery patients. In a first step, the researchers examined the nasal secretions of a random sample of 6771 patients admitted to various hospitals for surgery. They found that 1251 of these patients tested positive for Staphylococcus aureus, a bacterium responsible for most staph infections.4 (a) Describe the population and explain in words what the parameter p is. (b) Give the numerical value of the statistic that estimates p.