darren scored a mark of 57 on the MA test. The test had a mean of 50 and a standard deviation of 5. Jenny scored 120 IA tesst. This test had a mean of 100 and a standard deviation of 15. Comparing their scores, comment on who had a better score?

b)the performance scores(each score is an x-value) of three rivers were converted to standard scores. comment on what each of the standard z score indicate and determine the related implication

i)z=0.03

ii)4.2

iii)z=-0.49