A normal distribution of scores has a standard deviation of

Last updated: 7/7/2022

A normal distribution of scores has a standard deviation of 10 and a mean of O. Find the z-scores corresponding to each of the following values: a) A score that is 20 points above the mean. b) A score that is 10 points below the mean. c) A score that is 15 points above the mean d) A score that is 30 points below the mean.