Fuel efficiency of manual and automatic cars, Part II: The table provides summary statistics on highway fuel economy of cars manufactured in 2012. Use these statistics to calculate a 98% confidence interval for the difference between average highway mileage of automatic and manual cars, and interpret this interval in the context of the data. Use automatic as Group A and manual as Group B. Round your answers to 3 decimal places. 0 Mean SD n ✓ 35- O 25- 15- Hwy MPG, Automatic Hwy MPG, Manual 27.88 5.01 26 automatic 22.92 5.29 26 lower bound: 1.53 x mpg upper bound: 8.39 x mpg Interpret your confidence interval in the context of the problem: O 98% of manual and automatic cars will have a difference in highway mileage that falls within our confidence interval Hwy MPG manual We are 98% confident that the true difference in average highway mileage of manual and automatic cars is contained within our confidence interval Does your confidence interval provide significant evidence for a difference in the highway fuel efficiency of automatic versus manual cars? Explain. O We are 98% confident that our confidence interval contains the difference in average highway mileage of the cars in our sample is contained within our confidence interval Yes, since 0 is not contained within our confidence interval O No, since negative highway mileage doesn't make sense O Yes, since highway mileage cannot be negative O No, since 0 is not contained within our confidence interval

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Fuel efficiency of manual and automatic cars, Part II: The table provides summary statistics on highway
fuel economy of cars manufactured in 2012. Use these statistics to calculate a 98% confidence interval for
the difference between average highway mileage of automatic and manual cars, and interpret this interval
in the context of the data. Use automatic as Group A and manual as Group B. Round your answers to 3
decimal places.
0°
Mean
SD
n
35
25-
OB
15-
Hwy MPG, Automatic
22.92
5.29
26
Submit All Parts
automatic
Hwy MPG
lower bound: 1.53
x mpg
upper bound: 8.39
x mpg
Interpret your confidence interval in the context of the problem:
Hwy MPG, Manual
27.88
5.01
26
manual
O 98% of manual and automatic cars will have a difference in highway mileage that falls within our
confidence interval
We are 98% confident that the true difference in average highway mileage of manual and automatic
cars is contained within our confidence interval
O We are 98% confident that our confidence interval contains the difference in average highway
mileage of the cars in our sample is contained within our confidence interval
Does your confidence interval provide significant evidence for a difference in the highway fuel efficiency of
automatic versus manual cars? Explain.
Yes, since 0 is not contained within our confidence interval
O No, since negative highway mileage doesn't make sense
O Yes, since highway mileage cannot be negative
O No, since 0 is not contained within our confidence interval
Transcribed Image Text:Fuel efficiency of manual and automatic cars, Part II: The table provides summary statistics on highway fuel economy of cars manufactured in 2012. Use these statistics to calculate a 98% confidence interval for the difference between average highway mileage of automatic and manual cars, and interpret this interval in the context of the data. Use automatic as Group A and manual as Group B. Round your answers to 3 decimal places. 0° Mean SD n 35 25- OB 15- Hwy MPG, Automatic 22.92 5.29 26 Submit All Parts automatic Hwy MPG lower bound: 1.53 x mpg upper bound: 8.39 x mpg Interpret your confidence interval in the context of the problem: Hwy MPG, Manual 27.88 5.01 26 manual O 98% of manual and automatic cars will have a difference in highway mileage that falls within our confidence interval We are 98% confident that the true difference in average highway mileage of manual and automatic cars is contained within our confidence interval O We are 98% confident that our confidence interval contains the difference in average highway mileage of the cars in our sample is contained within our confidence interval Does your confidence interval provide significant evidence for a difference in the highway fuel efficiency of automatic versus manual cars? Explain. Yes, since 0 is not contained within our confidence interval O No, since negative highway mileage doesn't make sense O Yes, since highway mileage cannot be negative O No, since 0 is not contained within our confidence interval
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