### 7.25 Fuel EconomyAlthough the Environmental Protection Agency (EPA) establishes the tests to determine the fuel economy of new cars, it often does not perform them. Instead, the test protocols are given to the car companies, and the companies perform the tests themselves. To keep the industry honest, the EPA runs some spot checks each year. Recently, the EPA announced that Hyundai and Kia must lower their fuel economy estimates for many of their models.**Data Investigation:**The table below presents city miles per gallon (mpg) values for one of the models the EPA investigated:| Values ||--------|| 28.0 || 25.7 || 25.8 || 28.0 || 28.5 || 29.8 || 30.2 || 30.4 || 26.9 || 28.3 || 29.8 || 27.2 || 26.7 || 27.7 || 29.5 || 28.0 |**Statistical Analysis:**Calculate a 95% confidence interval for $ \mu $, the mean city mpg for this model. **Note:** Confidence intervals are used to estimate the range in which a population parameter will lie with a certain level of certainty, based on sample data.

Given: n = 16 Confidence level = 95% Formula Used: Confidence Interval = X ± t*sn

Answered: 7.25 Fuel economy. Although 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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