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 38 subscribers to Plan A is $58,500 with a standard deviation of $8,000. This distribution is positively skewed; the coefficient of skewness is not larger. For a sample of 42 subscribers to Plan B, the mean income is $59,100 with a standard deviation of $9,500. At the 0.02 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 H0 if t> -2.089 0 . 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 -O.307 O c. What is your decision regarding the null hypothesis? Do not reject 0 H0. There is not enough a evidence to conclude that the mean income of those selecting Plan B is not larger 0. d. What is the pvalue? (Round the final answer to 4 decimal places.) 0.3810 0