Mathematics, 02.11.2019 03:31 browndariel
Fueleconomy. gov, the official us government source for fuel economy information, allows users to share gas mileage information on their vehicles. the histogram below shows the distribution of gas mileage in miles per gallon (mpg) from 14 users who drive a 2012 toyota prius. the sample mean is 53.3 mpg and the standard deviation is 5.2 mpg. note that these data are user estimates and since the source data cannot be verified, the accuracy of these estimates is not guaranteed.
6 4 2 40 45 50 mileage (in mpg) 60 65
(a) we would like to use these data to evaluate the average gas mileage of all 2012 prius drivers. do you think this is reasonable? why or why not?
(b) the epa claims that a 2012 prius gets 50 mpg (city and highway mileage combined). do these data provide strong evidence against this estimate for drivers who participate on fueleconomy. gov? note any assumptions you must make as you proceed with the test.
(c) calculate a 95% confidence interval for the average gas mileage of a 2012 prius by drivers who participate on fueleconomy. gov.
Answers: 2
Mathematics, 21.06.2019 15:30, owlgirl554
Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x
Answers: 1
Mathematics, 21.06.2019 17:20, ryleepretty
Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?
Answers: 2
Fueleconomy. gov, the official us government source for fuel economy information, allows users to sh...
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