30. AOL Time Warner Inc.’s CNN has been the longtime ratings leader of cable television news. Nielsen Media Research indicated that the mean CNN viewing audience was 600,000 viewers per day during 2002 (The Wall Street Journal, March 10, 2003). A sample of the daily viewing audience for 40 days during the first half of 2003 is in the CD file named Viewers.

a. What are the hypotheses if CNN management would like information on any change in the CNN viewing audience?

b. What is the p-value?

c. Select your own level of significance. What is your conclusion?

d. What recommendation would you make to CNN management in this application?