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 41 subscribers to Plan A is $56 000 with a standard deviation of $8200. This distribution is positively skewed; the coefficient of skewness is not larger. For a sample of 45 subscribers to Plan B, the mean income is $57 700 with a standard deviation of $8900. At the 0.01 significance level, is it reasonable to conclude the mean income of those selecting Plan B is larger? a. State the decision rule. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.) Reject Ho if t> b. Compute the value of the test statistic. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.) Value of the test statistic c. What is the p-value? (Round the final answer to 4 decimal places.) d. What is your decision regarding the null hypothesis? (Click to select) v Ho. There is (Click to select) |evidence to conclude that the mean income of those selecting Plan B is (Click to select) v