A consumer research organization routinely selects several car models each year and evaluates their fuel efficiency .In this year’s study of two similar subcompact models from two different automakers ,the average gas mileage for 12 cars of brand A was 27.2 miles per gallon ,and the standard deviation was 3.8 mpg .The nine B brand cars that were tested averaged 32.4 mpg and the standard deviation was 4.3 mpg .At £ = 0.01,should it conclude that brand A cars have lower average gas mileage than do brand B cars ?
A consumer research organization routinely selects several car models each year and evaluates their fuel efficiency .In this year’s study of two similar subcompact models from two different automakers ,the average gas mileage for 12 cars of brand A was 27.2 miles per gallon ,and the standard deviation was 3.8 mpg .The nine B brand cars that were tested averaged 32.4 mpg and the standard deviation was 4.3 mpg .At £ = 0.01,should it conclude that brand A cars have lower average gas mileage than do brand B cars ?
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 consumer research organization routinely selects several car models each year and evaluates their fuel efficiency .In this year’s study of two similar subcompact models from two different automakers ,the average gas mileage for 12 cars of brand A was 27.2 miles per gallon ,and the standard deviation was 3.8 mpg .The nine B brand cars that were tested averaged 32.4 mpg and the standard deviation was 4.3 mpg .At £ = 0.01,should it conclude that brand A cars have lower average gas mileage than do brand B cars ?
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