Question

A sample of 33 blue-collar employees at a production plant was taken. Each employee was asked to assess his or her own job satisfaction (x) on a scale of 1 to 10. In addition, the numbers of days absent (y) from work during the last year were found for these employees. The sample regression line Y; = = 10.7 – – 0.2 x; was estimated by least squares for these data. Also found were T=Σ x = 7.0 Σ(x, -x = 50.0 SSE= 70.0 a. Test, at the 5% significance level against the appropriate one-sided alternative, the null hypothesis that job satisfaction has no linear effect on absenteeism. b. A particular employee has job satisfaction level 8. Find a 99% prediction interval for the number of days this employee would be absent from work in a year. 33 2 -X)=

Answer 1

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