Computers in some vehicles calculate various quantities related to performance.
ID: 3049221 • Letter: C
Question
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. Here are the mpg values for a random sample of 20 of these records:
Plot the margins of error versus the sample size and summarize the relationship. (Do the plot on paper. Your instructor may ask you to turn this in.) Pick one that best fits.
-As sample size increases, margin of error remains constant.
-As sample size increases, margin of error increases.
-There is no trend for margin of error as sample size increases.
-As sample size increases, margin of error decreases.
Enter a number 10 15 20 25 30 35 40 45 50 60 65 70 75 80 85 ) 95 100Explanation / Answer
40.2
44.2
38.3
47.8
44.2
35.5
38.3
45.1
45.6
49.1
47.3
44.3
44.4
37.8
51.4
48.4
49.0
42.4
43.2
45.8
We can say that as sample size increases, margin of error decreases.
D option
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