Question: 3.28 Runners. In a study of exercise, a large group of male runners walk on a treadmill for 6 minutes. Their heart rates in beats

3.28 Runners. In a study of exercise, a large group of male runners walk on a treadmill for 6 minutes. Their heart rates in beats per minute at the end vary from runner to runner ac cording to the N(104, 12.5) distribution. The heart rates for male nonrunners after the same exercise have the N( 130, 17)

distribution.

(a) What percent of the runners have heart rates ahove 130?

(b) What percent of the nonrunners have heart rates above 130?

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