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find the degrees of freedom?

find the degrees of freedom?

MATLAB: An Introduction with Applications
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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How do I find the degrees of freedom?
Fuel efficiency (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? Assume that conditions for inference are satisfied. Use automatic as Group A and manual as Group B. City MPG, Manual City MPG, Automatic 16.12 19.85 3.58 4.51 26 26 0° O The hypotheses for this test are: Ho: Hautomatic = Hmanual Ha: Hautomatic * Hmanual Mean SD n 35- The p-value is: 25- O Ho: Pautomatic = Hmanual Ha: Hautomatic Hmanual OB 15- O Ho: Hautomatic = manual Ha: Hautomatic Hmanual Ogreater than .25 O greater than .50 The degrees of freedom associated with this test is: 50 The test statistic is (round your answer to 3 decimal places): -3.3 O between .001 and .0025 O Impossible to Determine Obetween .002 and .005 automatic City MPG manual Interpret the result of the hypothesis test in the context of the problem:
Transcribed Image Text:Fuel efficiency (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? Assume that conditions for inference are satisfied. Use automatic as Group A and manual as Group B. City MPG, Manual City MPG, Automatic 16.12 19.85 3.58 4.51 26 26 0° O The hypotheses for this test are: Ho: Hautomatic = Hmanual Ha: Hautomatic * Hmanual Mean SD n 35- The p-value is: 25- O Ho: Pautomatic = Hmanual Ha: Hautomatic Hmanual OB 15- O Ho: Hautomatic = manual Ha: Hautomatic Hmanual Ogreater than .25 O greater than .50 The degrees of freedom associated with this test is: 50 The test statistic is (round your answer to 3 decimal places): -3.3 O between .001 and .0025 O Impossible to Determine Obetween .002 and .005 automatic City MPG manual Interpret the result of the hypothesis test in the context of the problem:
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