A sample of 10 blue-collar employees at a production plant was taken. Each employee was asked to assess their 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

was estimated by least squares for these data. Also found were

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 5. Find a 95% interval for the number of days this employee would be absent from work in a year.

Transcribed Image Text:

ŷi = 11.3 1.1x