For a sample of nine automobiles, the mileage (in 1000s of miles) at which the originalfront brake pads were worn to 10% of their original thickness was measured, as was themileage at which the original rear brake pads were wom to 10% of their original thickness.The results are given in the following table.AutomobileRear41.2Front32.8226.635.2335.646.1436.446.0529.239.940.951.740.951.634.846.136.647.3Find a 95% confidence interval for the difference in mean lifetime between thefront and rear brake pads.

Answered: Image /qna-images/answer/054b2a11-812d-424a-a153-c7a7a97f5c7e.jpg

Answered: For a sample of nine automobiles, 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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Please double check my answers.
A professor wants to evaluate whether testing students weekly with a quiz improves their learning of the class material. The professor teaches the same course in two different semesters, with a class size of 30 in both. In the first semester, the students completed a quiz each week. In the second semester, the students were not given any quizzes. Assume that the teaching was otherwise identical in each semester. The course percentage grade for each student is given in the sheet titled Test Scores. a. Analyze whether the class that was given the weekly quizzes scored higher on aver- age in the class. Give a 95% confidence interval as well as an appropriate test result. Be sure to comment on the validity of each of the two methods for this data. b. Analyze whether students were more likely to pass in the class that was given the weekly quizzes. Give a 95% confidence interval as well as an appropriate test result. Be sure to comment on the validity of each of the two methods for this…
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A particular dam contains approximately 1,200,000,000,000 cubic feet of water. For a week-long spike flood, water was released at a rate of 25,700 cubic feet per second. a. How much water was released during the flood? b. What percentage of the dam was released during the flood? a. The amount of water released during the week-long flood was (Simplify your answer.) GOOD b.% of the dam was released during the flood. (Type an integer or decimal rounded to the nearest hundredth as needed.)

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