Otis Elevators conducted a study and determined the mean weight for American adults is 187 lb with a standard deviation of 36lb.The distribution is approximately normally distributed.

(a)What is the probability of a randomly selected adult weighing more than 250 pounds?

Answer= minutes (enter a number between 0 and 2, 4 decimal places)

A random sample of 9 American adults is taken.

(b) What is the mean and standard deviation of the sample means?

Mean= lb

Standard Deviation= lb (1 decimal place)

Otis Elevators is installing an elevator in a large office building that will have a capacity of 9 people and a maximum load of 2,250 pounds.

(c)If there are 9 people in the elevator, that maximum load will be exceeded if the mean weight of the 9 people is above what weight?

Answer= lb

(d) Approximately, what is the probability that load will be exceeded if there are 9 people in the elevator?

10%

5%

0%