Question: An engineer is going to redesign an ejection seat for an airplane. The seat was was designed for pilots between 120 lb and 171 lb.

An engineer is going to redesign an ejection seat for an airplane. The seat was was designed for pilots between 120 lb and 171 lb. The new population of pilots has normally distributed weights with a mean of 128 lb and a standard deviation of 34.9 lb.

a. if a pilot is randomly selected, find the probability that the weight is between 120 lb and 171 lb.

b. if 30different pilots are randomly selected find the probability that their mean weight is between 120 ib and 171 Ib.

c. when redesigning the ejection seat, which probability is more relevant?

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