b) Rachel received the following scores on the midterm and final examinations in his introductory psychology course. The mean and the standard deviation for each test are given below. Assume that the normal distribution provides a good model for the frequency distribution. Section X M S Midterm 40 50 8 Final 90 100 12 i. What percentage of students scored better than Rachel on the midterm? (1 mark) Z=40-50/8=10/8=1.25 89.44%? Z=90-100/12=10/12=0.8 0.8*100=80%