The average U.S. TV Viewing at home is 2 hours and 20 minutes. A sample of 64 homes in the Detroit area showed an average usage of 2 hours and 40 minutes with a sample standard deviation of 80...

The average U.S. TV Viewing at home is 2 hours and 20 minutes. A sample of 64 homes in the Detroit area showed an average usage of 2 hours and 40 minutes with a sample standard deviation of 80 minutes. We are interested in determining whether or not the average internet usage in the Detroit  area is significantly different from the U.S. average. Use a significance level of α equal to 0.05.

Calculate using the Critical Value & P-Value Approaches