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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