2000 freshmen at State University took a biology test. The scores were normally distributed with a mean of 70 and a standard deviation of 5. The percent of students that scored between 65 and 75:

The percent of students that scored no more than 55:

The number of students that scored between 60 and 70:

The percent of students that scored at least 72:

The percent of students that scored between 67 and 79:

The percent of students that scored less than 77:

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297