Discussion:
Q1: For many years TV executives used the guideline that 30 percent of the audience were watching each of the prime-time networks and 10 percent were watching cable stations on a weekday night. A random sample of 500 viewers in the Tampa-St. Petersburg, Florida, area last Monday night showed that 165 homes were tuned in to the ABC affiliate, 140 to the CBS affiliate, 125 to the NBC affiliate, and the remainder were viewing a cable station. At the .05 significance level, can we conclude that the guideline is still reasonable?
Q2: Two hundred managers from various levels were randomly selected and interviewed regarding their concern about environmental issues. The response of each person was tallied into one of three categories: no concern, some concern, and great concern. The results were:
Level of Management No Concern Some Concern Great Concern
Top management 15 13 12
Middle management 20 19 21
Supervisor 7 7 6
Group leader 28 21 31
Use the .01 significance level to determine whether there is a relationship between management level and environmental concern.