Question: Complaints concerning excessive commercials seem to grow as the amount of "clutter," including commercials and advertisements for other television shows, steadily increases on network and cable television. A recent analysis by Nielsen Monitor-Plus compares the average non program minutes in an hour of prime time for both network and cable television. Data for selected years are shown as follows.
![1842_43.png](https://secure.tutorsglobe.com/CMSImages/1842_43.png)
a. Calculate the correlation coefficient for the average non program minutes in an hour of prime time between network and cable television.
b. Conduct a hypothesis test to determine if a positive correlation exists between the average non program minutes in an hour of prime time between network and cable television. Use a significance level of 0.05 and assume that these figures form a random sample.