Question: Identify the null and alternative hypotheses that would be used to support each of the following statements.

a) A state labor department claims that the current rate of unemployment in the state varies significantly from the forecast of 9.0% made one year ago.

b) The mean closing price of 90-day futures for pork bellies on the Chicago Mercantile Exchange during Sept. and Oct. is less than $55.50.

c) The mean age of Geritol customers is greater than 45.

d) During the flu epidemic, 40% of the city population suffers from flu attacks. A physician claims that regular users of vitamin C are less susceptible to flu.

e) A toothpaste manufacturer wants to establish that her sales amount is over 35% of market in Springfield.

f) The average rate of return on corporate A-rated bonds is less than 8%.

g) The average number of items purchased on a sales receipt at K-Mart department store is significantly different from14.56.

h) During months when the consumer price index goes up, the average percentage increase in money supply exceeds 5%.

i) The average time between order and delivery of a certain type of personal computer is less than 65 days.

j) The average customer at Bank of Springfield lives within 2 miles of the bank.