In a random sample of  style=”color:rgb(0,0,0);”>22 ​people, the mean commute time to work was 33.8 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 90​% 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 μ is

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