Exam scores of an easy exam (with y = 88, s = 10, minimum = 65, Q₁ = 77,

median = 85, Q₃ = 91 and maximum = 100).

Address the following questions:

1.Compute the z-score for the minumum and maximum exam scores. Are these values

unusual? (Note: it is unusual to observe an observation that is more than 3 standard

deviations from the mean in absolve value).

2.What are the most appropriate measure of centre and spread for the distributions of

job security based on the data?