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Automotive engineers investigated the effect of a particular additive on fuel economy of automobiles by computing the mean miles per gallon of five vehicles operated normally on fuel with the additive and then operated normally on fuel without the additive, with results shown in the table. Vehicle With 1 2 3 4 5 22.5 26.5 39.8 19.6 40.2 Without 22.7 25.2 36.7 19.6 39.9

Automotive engineers investigated the effect of a particular additive on fuel economy of automobiles by computing the mean miles per gallon of five vehicles operated normally on fuel with the additive and then operated normally on fuel without the additive, with results shown in the table. Vehicle With 1 2 3 4 5 22.5 26.5 39.8 19.6 40.2 Without 22.7 25.2 36.7 19.6 39.9

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
Section10.4: Distributions Of Data
Problem 19PFA
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a) construct a rejection region

c) compute the value of the test statistic and make a decision

d) State the conclusion about the mean change in fuel economy, based on the test you performed.

2. Automotive engineers investigated the effect of a particular additive on fuel economy of automobiles by computing the mean miles per gallon of five vehicles operated normally on fuel with the additive and then operated normally on fuel without the additive, with results shown in the table. Vehicle With 1 3 4 5 22.5 26.5 39.8 19.6 40.2 Without 22.7 25.2 36.7 19.6 39.9 Test whether the mean change in fuel economy is positive, at the 5% level of significance, in the following series of steps. The default is that the additive has no effect.
Transcribed Image Text:2. Automotive engineers investigated the effect of a particular additive on fuel economy of automobiles by computing the mean miles per gallon of five vehicles operated normally on fuel with the additive and then operated normally on fuel without the additive, with results shown in the table. Vehicle With 1 3 4 5 22.5 26.5 39.8 19.6 40.2 Without 22.7 25.2 36.7 19.6 39.9 Test whether the mean change in fuel economy is positive, at the 5% level of significance, in the following series of steps. The default is that the additive has no effect.
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