A data set is skewed right with a mean of 70 and a standard deviation of 10. If this represents the heart rate of a sample of 500 people, about how many people would you expect to have a heart rate of between 40 and 100?

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