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ught and installed fuel filters on my family's five cars that are supposed age. I thought l'd put them to the test-we recorded the fuel consumpti ch of road for each car (in miles-per-gallon). Here is a summary, with da che variance of each row: Car A Car B Car C Car D Car E bout Eiltor 21 5 17 2 21 0

ught and installed fuel filters on my family's five cars that are supposed age. I thought l'd put them to the test-we recorded the fuel consumpti ch of road for each car (in miles-per-gallon). Here is a summary, with da che variance of each row: Car A Car B Car C Car D Car E bout Eiltor 21 5 17 2 21 0

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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In testing the effect of the fuel filter mentioned in part (b), I suspected the variation of the gas mileage went up after installing the filters. I want to formally test the claim, at the a = 0.025 level of significance, that the gas mileages' variance after installation is higher than it was before installation. Using the data provided with (b), test this claim.
Transcribed Image Text:In testing the effect of the fuel filter mentioned in part (b), I suspected the variation of the gas mileage went up after installing the filters. I want to formally test the claim, at the a = 0.025 level of significance, that the gas mileages' variance after installation is higher than it was before installation. Using the data provided with (b), test this claim.
b) I bought and installed fuel filters on my family's five cars that are supposed to improve gas mileage. I thought l'd put them to the test-we recorded the fuel consumption along a rural stretch of road for each car (in miles-per-gallon). Here is a summary, with data for each car, and the variance of each row: Car A Without Filter 21.5 With Filter 22.7 Improvement 1.2 Car B Car C Car D Car E Variance 17.3 19.8 31.0 23.8 27.277 17.7 20.3 32.1 23.0 29.987 0.4 0.5 1.1 -0.8 0.67
Transcribed Image Text:b) I bought and installed fuel filters on my family's five cars that are supposed to improve gas mileage. I thought l'd put them to the test-we recorded the fuel consumption along a rural stretch of road for each car (in miles-per-gallon). Here is a summary, with data for each car, and the variance of each row: Car A Without Filter 21.5 With Filter 22.7 Improvement 1.2 Car B Car C Car D Car E Variance 17.3 19.8 31.0 23.8 27.277 17.7 20.3 32.1 23.0 29.987 0.4 0.5 1.1 -0.8 0.67
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Hypothesis Tests and Confidence Intervals for Equality of Variances
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