Elevator safety example 2 referred to an elevator with a maximum capacity of 4000 lb. when rating elevators, it is common to use a 25% safety factor, so the elevator should 6-4 basic skills and concepts 6-4 the central limit theorem 273 actually be able to carry a load that is 25% greater than the stated limit. the maximum capacity of 4000 lb becomes 5000 lb after it is increased by 25%, so 27 adult male passengers can have a mean weight of up to 185 lb. if the elevator is loaded with 27 adult male passengers, find the probability that it is overloaded because they have a mean weight greater than 185 lb. (as in example 2, assume that weights of males are normally distributed with a mean of 189 lb and a standard deviation of 39 lb.) does this elevator appear to be safe?