The final marks for the Wednesday class in Statistics 101 are ready to be posted. The class average is 70%, with a standard deviation of 8. Use the Empirical Rule to answer the following questions.
a. What percentage of the grades are between 62 and 78?
b. What percentage of the grades are between 54 and 86?
c. What percentage of the grades are between 46 and 94?
d. What percentage of the grades are more than 86?
e. What percentage of the grades are less than 46?
f. What percentage of the grades are less than 46 or more than 86?