A cell phone company offers two plans to its subscribers. At the time new subscribers sign up, they are asked to provide some demographic information. The mean yearly income for a sample of 40 subscribers to Plan A is $57,000 with a standard deviation of $9,200. For a sample of 30 subscribers to Plan B, the mean income is $61,000 with a standard deviation of $7,100. At the 05 significance level, is it reasonable to conclude the mean income of those selecting Plan B is larger?
required answers:
1. compute the test statistic (round andwrr to three decimal spaces.)
2. compute the p-value (round answer to four decimal spaces.)