In a calculus class, Jack scored a 9 on a quiz for which the class mean and standard deviation were 7.2 and 1.9,respectively. Norm scored 7 on another quiz for which the class mean and standard...

In a calculus class, Jack scored a 9 on a quiz for which the class mean and standard deviation were 7.2 and 1.9,respectively. Norm scored 7 on another quiz for which the class mean and standard deviation were 5.8 and 1.8, respectively. Relatively speaking, which student did better? Make use of z-scores