1. In a random sample of 18 people, the mean commute timeto work was 32.8 minutes and the standard deviation was7.3 minutes. Assume the population is normally distributed andus a t- distribution to construct an 80% confidence intervalfor the population mean μ. What is the margin of error ofμ? interpret the results.
2. In a random sample of six mobile devices, the meanrepair cost was $90.00, and the standard deviation was $12.50.Assume the population is normally distributed and usea t-distribution to find the margin of error and construct a95% confidence interval for the population mean. Interpret theresults.
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1422
1223
982
697
729
832
723
742
548
630
1440
941
Thank You!!!
1. In a random sample of 18 people, the mean commute time to work was 32.8 minutes and the standard deviation was 7.3
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