The number of days absent from work last year due to job-related cases of carpal tunnel syndrome…

The number of days absent from work last year due to job-related cases of carpal tunnel syndrome…

The number of days absent from work last year due to job-related cases of carpal tunnel syndrome were recorded for 25 randomly selected workers. The results are given in Table 11.1. When the data are used to set a confidence interval on the mean of the population of all job-related cases of carpal tunnel syndrome, a basic assumption underlying the procedure is that the number of days absent are normally distributed for the population. Use the data to test the normality assumption and if you are willing to assume normality, then set a 95% confidence interval on μ.

21

23

33

32

37

40

37

29

23

29

24

32

24

46

32

17

29

26

46

27

36

38

28

33

18

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