State the null and alternative hypotheses used to test each of the following claims:

a. The mean reaction time is greater than 1.25 seconds.

b. The mean score on that qualifying exam is less than 335.

c. The mean selling price of homes in the area is not $230,000.

d. The mean weight of college football players is no more than 210 lb.

e. The mean hourly wage for a childcare giver is at most $9.