Author Question: The average test score was a 77 with a standard deviation of 5. Using the Empirical Rule, ... (Read 74 times)

ssal · **on:** Jul 24, 2018

The average test score was a 77 with a standard deviation of 5. Using the Empirical Rule, approximately what percent of the class would you expect to receive a grade between 72 and 82?
1.68
2.75
3.89
4.95

Question 2

A test score was converted into a standard score. What does a z-score of 3.7 indicate about the performance on the test?
1.The grade was 3.7 points above the mean.
2.The grade was 3.7 points below the mean.
3.The performance well exceeded the class average.
4.Nothing can be said about the performance on the test.