Suppose That's scores on a knowledge test for normally distributed with a mean of 60 standard deviation of 4.3 scores on aptitude test are normally distributed with a mean of a 110 a standard deviation of 7.1. Boris scored a 57 on the knowledge test a 106 on the aptitude test Kelly scored 63 on the knowledge test a 114 on the aptitude test which tests didn't Boris perform better, which test did Cali perform better, Morris also took a logic test his the score on that test was -0.93 does this change the answer to which test Boris performed better on explain using z-score