The average age of commercial jets in the U.S. is 15.6 years.An executive at a large airline company claims that the average age of her planes is less than this.She randomly selects 32 of her company's planes, and finds the sample's average age is 15.2 years.The population standard deviation is 1.4 years.

With= 0.01, can the executive's claim be supported?

a) State the appropriate null and alternative hypotheses.

H0:

H1:

b) Compute the value of the test statistic.Round the answer to two decimal places.

z =

c) Find the P-Value.Round the answer to four decimal places.

P-value =

d) State the decision.

e) State a conclusion.