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
Posted: Tue Jul 05, 2022 9:56 am
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.
3
1422
1223
982
697
729
832
723
742
548
630
1440
941
Thank You!!!
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.
3
1422
1223
982
697
729
832
723
742
548
630
1440
941
Thank You!!!