Chapter 8.1, Problem 14E

For each conjecture, state the null and alternative hypotheses.

a. The average age of first-year medical school students is at least 27 years.

b. The average experience (in seasons) for an NBA player is 4.71.

c. The average number of monthly visits/sessions on the Internet by a person at home has increased from 36 in 2009.

d. The average cost of a cell phone is $79.95.

e. The average weight loss for a sample of people who exercise 30 minutes per day for 6 weeks is 8.2 pounds.