In a random sample of 20 ​people, the mean commute time to work was 30.2 minutes and the standard deviation was 7.3 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.

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In a random sample of 20 ​people, the mean commute time to work was 30.2 minutes and the standard deviation was

7.3 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.

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