In a random sample of 20 people, the mean commute time to work was 34.9 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% 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 (Round to one decimal place as needed.) C

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In a random sample of 20 people, the mean commute time to work was 34.9 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a
t-distribution to construct a 80% 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 ().
(Round to one decimal place as needed.)
Transcribed Image Text:In a random sample of 20 people, the mean commute time to work was 34.9 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% 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 (). (Round to one decimal place as needed.)
Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed.
c = 0.95, x= 13.2, s=0.61, n = 13
(Round to one decimal place as needed.)
Transcribed Image Text:Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c = 0.95, x= 13.2, s=0.61, n = 13 (Round to one decimal place as needed.)
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