If your data set is normally distributed, what proportion of the individuals do you expect to find:

Question:

If your data set is normally distributed, what proportion of the individuals do you expect to find:
a. Within one standard deviation from the average?
b. Within two standard deviations from the average?
c. Within three standard deviations from the average?
d. More than one standard deviation from the average?
e. More than one standard deviation above the average? (Be careful!)