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 27 9 23 5 39 0 28 0 24 7 28 4 28 9 30 0 33 6 33 3 34 1 35 1

Question: 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

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 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. 27.9 23.5 39.0 28.0 24.7 28.4 28.9 30.0 33.6 33.3 34.1 35.1

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