In an Intro Psychology class, all 83 students have completed an aggression rating scale. The possible ratings range from 1-7 with low scores indicating low aggression. Results showed that the average rating was 4.23 with a standard deviation of 1.02. Show your work and plot the location of scores using the normal curve distribution.

a) What is the percentile rank of a student showing a

raw score rating of 3.11?

b) Which scores are so deviant

that the probability of occurrence is 1% or less?

c) What is the probability and percentage of a raw score of 3.5 or less?

d) What is the probability and

percentage of a raw score of 3.5 or more?