The mean finish time for a yearly amateur auto race was 186.84 minutes with a standard deviation of 0.327 minute. The winning car, driven by Dan, finished in186.48 minutes. The previous year's race had a mean finishing time of 112.4 with a standard deviation of 0.125 minute. The winning car that year, driven by Beth,finished in 112.14 minutes. Find their respective z-scores. Who had the more convincing victory?Dan had a finish time with a z-score ofBeth had a finish time with a z-score of(Round to two decimal places as needed.)

Answered: Image /qna-images/answer/dccea8fc-79de-4268-8247-934b3b88cb71.jpg

Answered: The mean finish time for a yearly…

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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Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) TInterval below. (13.046,22.15) X = 17.598 Sx = 16.01712719 n = 50 a. Express the confidence interval in the format that uses the "less than" symbol. Given that the original listed data use one decimal place, round the confidence inter limits accordingly. Mbps < µ< Mbps (Round to two decimal places as needed.) b. Identify the best point estimate of u and the margin of error. The point estimate of u is Mbps. (Round to two decimal places as needed.) The margin of error is E = Mbps. (Round to two decimal places as needed.) c. In constructing the confidence interval estimate of u, why is it not necessary to confirm that the sample data appear to be from a population with a normal distribution? O A. Because the sample standard deviation is known, the normal distribution can be used to construct the confidence interval. B. Because the population standard deviation…
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Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.
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