The area under the curve to the left of z 2 was found to be

Last updated: 11/15/2023

The area under the curve to the left of z 2 was found to be 0 0228 and the area under the curve to the left of z 0 75 was found to be 0 2266 The area under the curve between these two values will be the difference of the larger area minus the smaller area Therefore the desired probability that a student will complete the exam in more than 60 minutes but less than 85 minutes is calculated as follows P 60 x 85 P 2 z 0 75 P Z 0 75 P Z 2 0 2266