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Each year the US Environmental Protection Agency (EPA) releases fuel economy data on cars manufactured in that year. Below are summary statistics on fuel efficiency (in miles/gallon) from random samples of cars with manual and automatic transmissions manufactured in 2012. Do these data provide strong evidence of a difference between the average fuel efficiency of cars with manual and automatic transmissions in terms of their average city mileage? Use a 0.05 significance level. (a) Find the test statistic. n ក 8² 3 Automatic (1) 26 15.41 12.5316 3.54 Manual (2) 26 20.48 19.7136 4.44 degrees of freedom: d.f. = 48 (b) Find the positive critical value. (c) Find the negative critical value.

Each year the US Environmental Protection Agency (EPA) releases fuel economy data on cars manufactured in that year. Below are summary statistics on fuel efficiency (in miles/gallon) from random samples of cars with manual and automatic transmissions manufactured in 2012. Do these data provide strong evidence of a difference between the average fuel efficiency of cars with manual and automatic transmissions in terms of their average city mileage? Use a 0.05 significance level. (a) Find the test statistic. n ក 8² 3 Automatic (1) 26 15.41 12.5316 3.54 Manual (2) 26 20.48 19.7136 4.44 degrees of freedom: d.f. = 48 (b) Find the positive critical value. (c) Find the negative critical value.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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Each year the US Environmental Protection Agency (EPA) releases fuel economy data on cars manufactured in that year. Below are summary statistics on fuel efficiency (in miles/gallon) from random samples of cars with manual and automatic transmissions manufactured in 2012. Do these data provide strong evidence of a difference between the average fuel efficiency of cars with manual and automatic transmissions in terms of their average city mileage? Use a 0.05 significance level. (a) Find the test statistic. ₂2 n 8 Automatic (1) 26 15.41 12.5316 3.54 Manual (2) 26 20.48 19.7136 4.44 degrees of freedom: d.f. = 48 (b) Find the positive critical value. (c) Find the negative critical value.
Transcribed Image Text:Each year the US Environmental Protection Agency (EPA) releases fuel economy data on cars manufactured in that year. Below are summary statistics on fuel efficiency (in miles/gallon) from random samples of cars with manual and automatic transmissions manufactured in 2012. Do these data provide strong evidence of a difference between the average fuel efficiency of cars with manual and automatic transmissions in terms of their average city mileage? Use a 0.05 significance level. (a) Find the test statistic. ₂2 n 8 Automatic (1) 26 15.41 12.5316 3.54 Manual (2) 26 20.48 19.7136 4.44 degrees of freedom: d.f. = 48 (b) Find the positive critical value. (c) Find the negative critical value.
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