Emily S.

asked • 09/24/17

(a) What percent of the runners have heart rates above 143? (b) What percent of the nonrunners have heart rates above 143?

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 according to the
N(106, 12.1) distribution. The heart rates for male nonrunners after the same exercise have the  N(138, 18)
distribution. (Round your answers to two decimal places.)

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