Question

the numbers with red x's are answers that i have already tried that are incorrect

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 miles per gallon were recorded each time the gas tank was filled, and the computer was then reset. In addition to the computer calculating miles per gallon, the driver also recorded the miles per gallon by dividing the miles driven by the number of gallons at fill-up. The driver wants to determine if these calculations are different Fill-up 1 2 3 4 5 6 7 8 9 10 Computer 41.4 50.5 36.5 37.4 34.2 447 48.0 43.2 47.4 42.0 Driver 36.5 44.2 37.2 35.6 30.5 40.5 40.0 41.0 42.8 39.2 Fill-Up 11 12 13 14 15 16 17 18 19 20 Computer 430 44.6 48.4 46.2 46. 639.3 37.5 43.5 44.243.3 Driver 38.8 44.5 45.4 45.3 45.7 34.2 35.239. 844.9 47.5

Answer 1

Here we reject the null hypothesis as p value is very small.

Claim: The calculation are different (Mato.) Note: The values are paired for each vehicle. So we have to use paired t-test. cil Ho: Md Zo versus Ha: My &0. (two-tailed tast) in all Md = Computer - Driver 6.3 – 0.6 dp 4.5 1.8 3.9 4.2 8.0 2.2 4.6 2.8 20 ti " 12 13 14 15 16 17 18 19 20 d: hoe o.l 3.0 0.9 0.9 Sol 2.3 3.7 -0.7 - 4.2 for differences Sample mean đ= = 52.8 = 12.64] standard deviation Saat 1) (ad?- (Eldj2) = 1 1 1 1 2861-(52872) Su = 2.9597 The test statistic t= (d - Md) = 2.64-0 =4 C ) 21527.j=14 t = [4.2782 The degrees of freedom ={n-1)=20-1=(19) The parole - 10.0004. 1.2782 Sa 6797 Ve