d. Below the mean by 15 points. 3. For a distribution with a standard deviation of o = 20, describe the location of each of the following z-scores in terms of its position relative to the mean. For example, z = +1.00 is a location that is 20 points above the mean. a. z = +2.00 b. z = +0.50 C. Z = -1.00 d. z = -0.25 4 For ation with u - 60 and - 12