The first statistics exam had a mean of 74 and a standard deviation of 11 points; the second had a mean of 83 and a standard deviation of 6 points. Anna scored a 84 on both test Megan scored 90 on the first exam and 78 on the second. They both totaled 168 points on the two exams, but Anna claims that her total is better. Explain. The total of Anna's z-scores is , which is greater than Megan's total of (Round to one decimal place as needed.)