Question: Some peopleare notfunctionallyimpairednow,buttheirpulmonaryfunction usuallydeclineswithageandtheyeventually willbefunctionallyimpaired.Assumethat thedecline in FEVoveryearsisnormallydistributed,withmean=0.03nL andstandarddeviation=0.02n L. 5.23Whatistheprobabilitythata45-year-oldmanwithan EVof4.0 L will be functionally impairedbyage75?

Some people are not functionally impaired now, but their pulmonary function usually declines with age and they eventually will be functionally impaired. Assume that the decline in FEV over years is normally distributed, with mean= 0.03n L and standard deviation = 0.02n L. 5.23What is the probability that a 45-year-old man with an EV of 4.0 L will be functionally impaired by age 75?

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