s mileage with additive)-(gas mileage without additive). Use a significance level of a = 0.05 for the test. Assume that or the population of all cars both with and without the additive, %3D Car 3 4 5 7 10 Without additive 22.9 20.9 11.3 27.1 9.5 19.4 16.8 16.8 20.1 27.2 With additive 25.6 23.6 13.3 28.7 13. 22 17 18.2 21 29.6 Find the value of the standard deviation of the paired differences. Round your answer to two decimal places. Pour answer

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A major oil company has developed a new gasoline additive that is supposed to increase mileage. To test this hypothesis, ten cars are randomly selected. The cars
are driven both with and without the additive, The results are displayed in the following table. Can it be concluded, from the data, that the gasoline additive does
significantly increase mileage?
Let d = (gas mileage with additive)-(gas mileage without additive). Use a significance level of a = 0.05 for the test. Assume that the gas mileages are normally
distributed for the population of all cars both with and without the additive,
Car
1
2
3
4
6
7
9
10
Without additive
22.9
20.9
11.3
27.1
9.5
19.4
16.8
16.8
20.1
27.2
With additive
25.6
23.6
13.3
28.7
13.
22
17
18.2
21
29.6
Copy Data
Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to two decimal places.
Answer
E Tables
E Keypad
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Transcribed Image Text:A major oil company has developed a new gasoline additive that is supposed to increase mileage. To test this hypothesis, ten cars are randomly selected. The cars are driven both with and without the additive, The results are displayed in the following table. Can it be concluded, from the data, that the gasoline additive does significantly increase mileage? Let d = (gas mileage with additive)-(gas mileage without additive). Use a significance level of a = 0.05 for the test. Assume that the gas mileages are normally distributed for the population of all cars both with and without the additive, Car 1 2 3 4 6 7 9 10 Without additive 22.9 20.9 11.3 27.1 9.5 19.4 16.8 16.8 20.1 27.2 With additive 25.6 23.6 13.3 28.7 13. 22 17 18.2 21 29.6 Copy Data Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to two decimal places. Answer E Tables E Keypad How to enter your answer Keyboard Shortcuts Previous Step Answers
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