Question

5

The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 120, while the mean score was 78 and the standard deviation was 8.

546270788694102Distribution of Test Scores

What is the approximate percentage of students who scored less than 62 on the test?
%

What is the approximate percentage of students who scored between 70 and 78?
%

What is the approximate percentage of students who scored lower than 54 on the test?
%

What is the approximate percentage students who scored between 70 and 86 on the test?
%

9

In a normal distribution, a data value located 0.6 standard deviations below the mean has Standard Score: z =

In a normal distribution, a data value located 2.5 standard deviations above the mean has Standard Score: z =

In a normal distribution, the mean has Standard Score: z =

Answer 1