The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 140, while the mean score was 75 and the standard deviation was 15.
30
45
105
120
60 75 90
Distribution of Test Scores
Q
What is the approximate percentage of students who scored between 30 and 75 on the test?
What is the approximate percentage students who scored between 60 and 90 on the test?
What is the approximate percentage of students who scored between 75 and 90 on the test?
What is the approximate percentage of students who scored less than 45 on the test?