Discussion:
Q: Absenteeism among assembly workers is of concern. In particular, there may be a relationship between the day of the week on which absence occurs and the type of job performed by the worker. Workers are classified as skilled, semiskilled and laborer. A random sample of days absent was selected from records kept over the past several years; workers were never included more than once on the following results:
Days Absent Among Assembly Line Workers
Type of Workers
Days Skilled Semiskilled Laborer
Monday 18 23 21
Tuesday 10 16 17
Wednesday 12 11 9
Thursday 17 16 16
Friday 22 26 20
Use an alpha of 0.05
Are days and type of workers independent?