Question

Before every​ flight, the pilot must verify that the total weight of the load is less than the maximum allowable load for the aircraft. The aircraft can carry 42 ​passengers, and a flight has fuel and baggage that allows for a total passenger load of 6,804 lb. The pilot sees that the plane is full and all passengers are men. The aircraft will be overloaded if the mean weight of the passengers is greater than 6,804 /42 equals 162 lb. What is the probability that the aircraft is​ overloaded? Should the pilot take any action to correct for an overloaded​ aircraft? Assume that weights of men are normally distributed with a mean of 174.2 lb and a standard deviation of 37.9.

Answer 1

Solution :

Given that ,

= 174.2

= / n = 37.9 / 42 = 5.85

P( > 162) = 1 - P( < 162)

= 1 - P[( - ) / < (162 - 174.2) / 5.85]

= 1 - P(z <-2.09 )   

= 1 - 0.0183

= 0.9817

Yes. Because the probability is​ high, the pilot should take action by somehow reducing the weight of the aircraft