A student measured the volume of gas produced in 30 seconds from a reaction between 2g of magnesium and 20cm' of 2 mol/dm hydrochloric
acid. The student repeated the experiment 5 times and the volumes
collected (cm) were: 13.5, 13.1. 17.5, 13.7 and 13.0. Calculate the mean,
discounting any anomalies.

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