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3. The operatians division manager of a logistics company is trying to identify whether the use of nitrogen to fill tires instead of normal air improves fuel economy. The tires of 12 trucks were filled with nitrogen and tested over a prescribed course. Without changing drivers, the tires of the same trucks were then filled with normal air and driven once again over the test course. The mileage was recorded as follows: Mileage (in kilameters/liter) Using NitrogenUsing Normal Air Truck 5.1 4.9 2 4.8 4.8 5.2 5.4 4.7 5.3 4,8 5.1 5.6 5,4 4.6 4.8 4.8 4.9 5.0 4.5 5.6 5.1 5.1 4.2 5.5 5.0 10 11 12 a. Test whether using nitrogen instead of normal air improves fuel econamy (increases the mileage) at 0.05 level of significance. b. Find a 95% confidence interval of the difference between the mean of mileage of trucks whose tires is filled with nitrogen and the mileage of trucks filled whose tires is filled with normal air. Interpret.

3. The operatians division manager of a logistics company is trying to identify whether the use of nitrogen to fill tires instead of normal air improves fuel economy. The tires of 12 trucks were filled with nitrogen and tested over a prescribed course. Without changing drivers, the tires of the same trucks were then filled with normal air and driven once again over the test course. The mileage was recorded as follows: Mileage (in kilameters/liter) Using NitrogenUsing Normal Air Truck 5.1 4.9 2 4.8 4.8 5.2 5.4 4.7 5.3 4,8 5.1 5.6 5,4 4.6 4.8 4.8 4.9 5.0 4.5 5.6 5.1 5.1 4.2 5.5 5.0 10 11 12 a. Test whether using nitrogen instead of normal air improves fuel econamy (increases the mileage) at 0.05 level of significance. b. Find a 95% confidence interval of the difference between the mean of mileage of trucks whose tires is filled with nitrogen and the mileage of trucks filled whose tires is filled with normal air. Interpret.

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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3. The operations division manager of a logistics company is trying to identify whether the use of nitrogen to fill tires instead of normal air improves fuel economy. The tires of 12 trucks were filled with nitrogen and tested over a prescribed course. Without changing drivers, the tires of the same trucks were then filled with normal air and driven once again over the test course. The mileage was recorded as follows: Mileage (in kilometers/liter) Using Nitrogen Using Normal Air 5.1 Truck 4.9 2. 4.8 4.8 5.4 5.2 4 4.7 4.8 5.3 5.1 5.6 5,4 4,6 6 4.8 4.9 4.8 9. 5.0 5.1 10 4.5 4.2 11 5.6 5.5 12 5.1 5.0 a. Test whether using nitrogen instead of normal air improves fuel econamy (increases the mileage) at 0.05 level of significance. b. Find a 95% confidence interval of the difference between the mean of mileage of trucks whose tires is filled with nitrogen and the mileage of trucks filled whose tires is filled with normal air. interpret.
Transcribed Image Text:3. The operations division manager of a logistics company is trying to identify whether the use of nitrogen to fill tires instead of normal air improves fuel economy. The tires of 12 trucks were filled with nitrogen and tested over a prescribed course. Without changing drivers, the tires of the same trucks were then filled with normal air and driven once again over the test course. The mileage was recorded as follows: Mileage (in kilometers/liter) Using Nitrogen Using Normal Air 5.1 Truck 4.9 2. 4.8 4.8 5.4 5.2 4 4.7 4.8 5.3 5.1 5.6 5,4 4,6 6 4.8 4.9 4.8 9. 5.0 5.1 10 4.5 4.2 11 5.6 5.5 12 5.1 5.0 a. Test whether using nitrogen instead of normal air improves fuel econamy (increases the mileage) at 0.05 level of significance. b. Find a 95% confidence interval of the difference between the mean of mileage of trucks whose tires is filled with nitrogen and the mileage of trucks filled whose tires is filled with normal air. interpret.
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