CCN and ActMedia provided a television channel targeted to individuals waiting in super- market checkout lines. The channel showed news, short features, and advertisements. The length of the program was based on the assumption that the population mean time a shop- per stands in a supermarket checkout line is 8 minutes. A sample of actual waiting times will be used to test this assumption and determine whether actual mean waiting time dif- fers from this standard. a. Formulate the hypotheses for this application. b. A sample of 120 shoppers showed a sample mean waiting time of 8.4 minutes. Assume a population standard deviation of o = 3.2 minutes. What is the p-value? c. At a = .05, what is your conclusion? d. Compute a 95% confidence interval for the population mean. Does it support your conclusion