Statistics z-score (1 question)

1. John & Jayro, of Motah Pharmaceuticals, found that the scores on a training exam for their new trainees were normally distributed with a mean score of 67 and the standard deviation of 8. Use this information in answering “a” through “c”, draw bell curves. 

1. About what percentage of the exam scores were above 85? (2pts)

b.   A failing grade on the exam was anything 1.5 or more standard 

      deviations below the mean. What was the cutoff for a failing score?   

      (2pts)

                c.   What are the standard scores that correspond to trainee scores 

                      between 66 and 79 on the exam? (1 pt).