Data are drawn from a bell-shaped distribution with a mean of 20 and a standard deviation of

Question:

Data are drawn from a bell-shaped with a mean of 20 and a standard deviation of 2.
a. What percentage of the observations fall between 18 and 22?
b. What percentage of the observations fall between 16 and 24?
c. What percentage of the observations are less than 16?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...