The International Air Transport Association surveys business travelers to develop qualityratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose asimple random sample of 20 business travelers is selected and each traveler is asked toprovide a rating for ABE airport. The ratings obtained from the sample of 20 businesstravelers follow. Hint: You can use AVERAGE and STDEV in Excel to answer some of thesequestions. Hint: Notice that your sample size is <30, meaning when calculating the margin oferror, you have to use the t-distribution with (n-1) dofs64687787594484599597a. Calculate a point estimate of the population mean. 6.55b. Calculate a point estimate of the population standard deviation. 1.8489c. Calculate the 95% margin of error for the point estimate in part (a). 0.87d. Calculate a 95% confidence interval for the population mean.Ⓒ(5.68; 7.42)O(6.20; 8.42)O(5.28; 7.62)

a) The number of observations n is 20.

Answered: a. Calculate a point estimate of the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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a. Calculate a point estimate of the population mean. 6.55 b. Calculate a point estimate of the population standard deviation. 1.8489 c. Calculate the 95% margin of error for the point estimate in part (a). 0.87 d. Calculate a 95% confidence interval for the population mean.