Answered: An automobile company is looking for…

Name: An automobile company is looking for fuel additives that might increas
Uploaded: 2024-03-20T07:07:12.000Z
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Description: An automobile company is looking for fuel additives that might increase gas mileage. Without additives, their cars are known to average 19 mpg (miles per gallons) with a standard deviation of 19/6 mpg on a road trip from Muscat to Sur. The company no

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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An automobile company is looking for fuel additives that might increase gas mileage. Without additives, their cars are known to average 19 mpg (miles per gallons) with a standard deviation of 19/6 mpg on a road trip from Muscat to Sur. The company now asks whether a new additive increases this value. In a study, forty cars are sent on a road trip from Muscat to Sur. Suppose it turns out that the forty cars averaged x = (19 + 0.75) mpg with the additive. Can we conclude from this result that the additive is effective?

a. With a significance level of 5%.
b. With a significance level of 1%.

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