Employers often use standardized measures to gauge how likely it is that a new employee with little to no experience will succeed in their company. One such factor is intelligence, measured using the Intelligence Quotient (IQ). To show that this factor is related to job success, an organizational psychologist measures the IQ score and job performance (in units sold per day) in a sample of 10 new employees.
IQ _______________________________ Job performance
100.........................................................16
115.........................................................38
108.........................................................31
98.........................................................15
120.........................................................44
147.........................................................54
132.........................................................40
85.........................................................60
105.........................................................29
110.........................................................35
(a) Convert the data in the table above to ranks and then compute a Spearman correlation coefficient.
(b) Using a two-tailed test at a .05 level of significance, state the decision to retain or reject the null hypothesis.