An exercise physiologist has designed two alternative training regimes which he hopes will enable middle distance runners to improve their times at the 800 metres.He wants to know which regime will work better.Design an experiment which will allow him to investigate this question.Assume that all the athletic coaches in a district are prepared to participate and assume that all athletes training with a particular coach will follow the same regime.Be sure to identify the factors,the levels,treatments,and response variable.

Answers may vary.Obtain a group of volunteer middle distance runners.Time them at the 800 metres at the start of the experiment.Randomly assign runners to one of the coaches.Randomly assign half the coaches to use training regime 1 and half to use training regime 2.Agree on the duration of the training period.At the end of the training period,time each athlete again at the 800 metres.Compare the improvement for athletes following regime 1 and those following regime 2.Have the person timing the athletes blinded to whether they had followed regime 1 or 2. Factor: training regime Levels: regime 1,regime 2 Treatments: regime 1,regime 2 Response variable: improvement in time at 800 m