A normal distribution of scores has a standard deviation

Last updated: 7/8/2022

A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values: a) A score of 60, where the mean score of the sample data values is 40. b) A score that is 30 points below the mean. c) A score of 80, where the mean score of the sample data values is 30.