State whether and why (or why not) you would expect each of the following data sets to be normally distributed.

19. THE 68-95-99.7 RULE. A set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to fine the percentage of scores in each of the following categories.

a. Greater than 100

b. Greater than 120

c. Less than 80

d. Less than 140

e. Less than 60

f. Less than 120

g. Greater than 80

h. Between 80 and 120