Use the Empirical Rule to answer the following questions about test scores.

a. The mean is ______.

b. The standard deviation is ______.

c. ______% of the test scores are between 58 and 66.

d. ______% of the test scores are between 54 and 70.

e. ______% of the test scores are between 50 and 74.

f. ______% of the test scores are between 62 and 66.

g. ______% of the test scores are less than 62.

h. ______% of the test scores are less than 66.