Question

in a distribution, a z - score of z = +1.00 corresponds to a position that is
one point below the mean
one standard deviation above the mean
one standard deviation below the mean
one point above the mean

Explanation:

The z - score represents the number of standard deviations a data - point is from the mean. A positive z - score indicates the data - point is above the mean. A z - score of + 1.00 means the data - point is one standard deviation above the mean.

Answer:

one standard deviation above the mean