54. A recently completed study attempted to relate job satisfaction to income (in 1,000s) and seniority for a random sample of 9 municipal workers. The job satisfaction value given for each worker is his or her own assessment of such, with a score of 1 being the lowest and 10 being the highest. The following data resulted

(a) Estimate the regression parameters.

(b) What qualitative conclusions can you draw about how job satisfaction changes when income remains fixed and the number of years of service increases?

(c) Predict the job satisfaction of an employee who has spent 5 years on the job and earns a yearly salary of $31,000.

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Yearly Income Years on the Job Job Satisfaction 27 8 5.6 22 4 6.3 34 12 6.8 28 9 6.7 36 16 7.0 39 14 7.7 33 a 10 7.0 42 15. 8.0 46 22 7.8