In a random sample of 29 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 98% confidence interval for the population mean μ. What is the margin of error of µ? Interpret the results. The confidence interval for the population mean u is D. (Round to one decimal place as needed.)

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