Chapter 5, Problem 5.5P

At St. Algebra College, the 200 freshmen enrolled in introductory biology took a final exam on which their mean score was 72 and their standard deviation was 6. The following table presents the grades of 10 students. Convert each into a $Z$ score and determine the number of people who scored higher or lower than each of the 10 students. (HINT: Multiply the appropriate proportion by $N$ and round the result.)

$X_i$	$Z$ score	Number of Students Above	Number of students Below
60
57
55
67
70
72
78
82
90
95