subject
Mathematics, 15.04.2020 20:55 skylerdemi1

Computers in some vehicles calculate various quantities related to performance. One of these is the fuel efficiency, or gas mileage, usually expressed as miles per gallon (mpg). For one vehicle equipped in this way, the mpg were recorded each time the gas tank was filled, and the computer was then reset. In addition to the computer computing mpg, the driver also recorded the mpg by dividing the miles driven by the number of gallons at each fill-up. The following data are the differences between the computer's and the driver's calculations for a random sample of 20 records. The driver wants to determine if these calculations are different. Assume the standard deviation of a difference to be ? = 3.0.

4.0 7.5 ?0.6 1.7 3.7 4.5 6.0 2.2 4.6 3.0
4.4 0.2 3.0 1.1 1.1 6.0 2.1 3.7 ?0.6 ?4.2
(a) State the appropriate H0 and Ha to test this suspicion.

H0: ? < 0 mpg; Ha: ? > 0 mpg

H0: ? > 0 mpg; Ha: ? < 0 mpg

H0: ? = 3 mpg; Ha: ? ? 3 mpg

H0: ? = 0 mpg; Ha: ? ? 0 mpg

H0: ? > 3 mpg; Ha: ? < 3 mpg

(b) Carry out the test. Give the P-value. (Round your answer to four decimal places.)

Interpret the result in plain language.

We conclude that ? = 3 mpg; that is, we have strong evidence that the computer's reported fuel efficiency does not differ from the driver's computed values.

We conclude that ? = 0 mpg; that is, we have strong evidence that the computer's reported fuel efficiency differs from the driver's computed values.

We conclude that ? ? 0 mpg; that is, we have strong evidence that the computer's reported fuel efficiency does not differ from the driver's computed values.

We conclude that ? ? 3 mpg; that is, we have strong evidence that the computer's reported fuel efficiency differs from the driver's computed values.

We conclude that ? ? 0 mpg; that is, we have strong evidence that the computer's reported fuel efficiency differs from the driver's computed values.

ansver
Answers: 2

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 15:00, jumoke26
1. are the triangles similar and if so why? what is the value of x? show your work.
Answers: 1
image
Mathematics, 21.06.2019 15:00, Tiff7859
With this question! what is process of elimination? ? p. s. my brothers acc got banned so add his new one @ yamauchiyamyam17
Answers: 2
image
Mathematics, 21.06.2019 16:00, AmbitiousAndProud
30 pts, will mark brainliestwhat is the period of the sinusoidal function? (picture 1)what is the minimum of the sinusoidal function? (picture2)what is the maximum of the sinusoidal function? (picture 3)
Answers: 3
image
Mathematics, 21.06.2019 18:00, kush3489t
Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?
Answers: 3
You know the right answer?
Computers in some vehicles calculate various quantities related to performance. One of these is the...

Questions in other subjects: