Problem: In the past year James has moved to a new state, changed jobs, and experienced the end of a relationship. The Holmes and Rahe Stress Scale (HRSS) is used to assess one's cumulative stress in the past year and this score (1-600) is used to assess their risk for developing some sort of mental health condition. The mean score is 250 with a standard deviation of 20. James completes the HRSS and receives a score of 294.
Calculate James' z-score and determine what percent of scores in the population distribution are higher than his? Hint: You will need to refer to the normal curve table in the appendix of your textbook or to the Z-distribution tables I have posted in this module.