5. A. 0.0031 Faculty members at a large university have found over the past several semesters that a cell phone rings in class on average 20 times per semester. A reporter for the school newspaper claims that students are more courteous with their cell phones now than in past semesters and that the average has decreased. The reporter nds that in a random sample of 19 classes, the average number of times a cell phone rang last semester was 18.3 with a standard deviation of 2.7 calls. Does the evidence support the reporters claim? A hypothesis test was conducted, with the test statistic calculated to be -2.74 The corresponding p-value is: B. 0.0062 C. 0.005