6. The heights of all KSU statistic students were recorded as a histogram, and the resulting graph was bimodal. What does this mean? (a) The graph shows evidence that two different groups are combined in the graph (here: male and female students).
(b) The best measure of average is the value directly between the two peaks. (c) A mistake must have been made as the graph should be bell-shaped. (d) The graph is useless since it is bimodal.

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