What proportion of a normal distribution is located between each of the following z-score boundaries? a. z

Question:

What proportion of a normal is located between each of the following z-score boundaries?
a. z = -0.25 and z = +0.25
b. z = -0.67 and z = +0.67
c. z = -1.20 and z = +1.20
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...