Data represent confidence intervals for mean

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Reference no: EM13977610

The accompanying data represent one-way commuting times (minutes) for a simple random sample of 15 persons who work at a large assembly plant.  The  data  are  also  in  file  XR09082. Assuming  an approximately normal distribution of commuting times for those who work at the plant, construct and interpret the 90% and 95% confidence intervals for the mean.

21.7

26.8

33.1

27.9

23.5

39.0

28.0

24.7

28.4

28.9

30.0

33.6

33.3

34.1

35.1

Reference no: EM13977610

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