Commuting to work:
i sixsigma
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Commuting to work:
A community survey sampled 1923 people in Colorado and asked them how long it took them to commute to work each day. The sample mean one-way commute time was 25.7 minutes with a standard deviation of 13 minutes. A transportation engineer claims that the mean commute time differs from 25 minutes. Do the data provide convincing evidence that the engineer's claim is true? Use the alpha = 0.10 level of significance and the P-value method with the TI-84 Plus calculator.