Question

An engineer is going to redesign 140 lb and a standard deviation of 33.1 lb. ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 171 lb. The new population of pilots has normally distributed weights with a mean of . If a pilot is randomly selected, find the probability that his weight is between 130 lb and 171 lb. The probability is approximately (Round to four decimal places as needed.) . If 30 different pil ots are randomly selected, find the probability that their mean weight is between 130 lb and 171 lb. The probability is approximately. (Round to four decimal places as needed.) When redesigning the ejection seat, which probability is more relevant? O A. ra single pilot is more important. Part (b) because the seat performance O B. O C. O D. Part (a) because the seat performance ra single pilot is more important. Part (a) because the seat performance for a sample of pilots is more important. Part (b) because the seat performance for a sample of pilots is more important.

Answer 1

x ~N (, м:140 33-/ т? 130 с х < 19) P(Во-ма z <Plelge 33.1 33.1 -о. зог1 <z< 0.9366) о. Чич2 (6> иззо 130 < х-мe 1-M Ctьт s> 2> 8hsg-1-1 о:451