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In a random sample of 20 ​people, the mean commute time to work was 32.6 minutes...

In a random sample of 20 ​people, the mean commute time to work was 32.6 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 80​% confidence interval for the population mean mu. What is the margin of error of u​? Interpret the results.

The confidence interval for the population mean u is?

What is the margin of error?

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