Question

A car gets 44 miles/gallon on the highway and 20 miles/gallon in the city. Estimate the average miles/gallon for a trip consisting of 60 miles on the highway and 10 miles in the city, then convert this number to SI units (km/L).

Answer #1

A car gets miles/gallon on the highway and 20
miles/gallon in the city. estimate the average miles/gallon for a
trip consisting of 60 miles on the highway and 10 miles in the
city, then convert this number to SI umits (km/L).

Suppose your car gets 26 miles per gallon of gasoline, and you
are driving at 50 miles per hour. Using unit analyses find the
number of hours it takes to use 1 gallon of gas

We expect a car's highway gas mileage to be related to its city
gas mileage (in miles per gallon, mpg). Data for all 1137 vehicles
in the government's Fuel Economy Guide give the regression
line
highway mpg = 6.785 + (1.033 * city mpg)
for predicting highway mileage from city mileage.
(a) What is the slope of this line? (Enter your answer to three
decimal places.)
mpg
Say in words what the numerical value of the slope tells us.
Highway...

We expect a car's highway gas mileage to be related to its city
gas mileage (in miles per gallon, mpg). Data for all 1137 vehicles
in the government's 2013 Fuel Economy Guide give the
regression line
highway mpg = 6.785 + (1.033 × city mpg)
for predicting highway mileage from city mileage.
(a) What is the slope of this line? (Enter your answer to three
decimal places.)
____mpg
Say in words what the numerical value of the slope tells us....

An automobile manufacturer introduces a new model that
averages 27 miles per gallon in the city. A person who plans to
purchase one of these new cars wrote the manufacturer for the
details of the tests, and found out that the standard deviation is
3 miles per gallon. Assume that in-city mileage is approximately
normally distributed (use z score table)
a) What percentage of the time is the car averaging less than
20 miles per gallon for in-city driving.
b)...

A Ford Focus manual transmission gets an average of 28 miles per
gallon (mpg) in city driving with a standard deviation of 1.6 mpg.
Assume that gas mileage is normally distributed.
a) If a Focus is selected at random, what is the probability
that it will get more than 31 mpg?
b) What is the probability that a randomly selected Focus will
get between 20 and 30 mpg?
c) What is the probability that a randomly selected Focus will
get...

We expect a car’s highway gas mileage to be related to its city
gas mileage (in mpg). Data for all 12091209 vehicles in the
government’s 2016 Fuel Economy Guide give the regression
line
highway mpg=7.903+(0.993×city mpg)highway mpg=7.903+(0.993×city
mpg)
for predicting highway mileage from city mileage.
(a) What is the slope of this line? (Enter your answer rounded
to three decimal places.)
slope:
What does the numerical value of the slope tell you?
Highway gas mileage increases with city gas mileage...

We expect a car’s highway gas mileage to be related to its city
gas mileage (in mpg). Data for all 1209 vehicles in the
government’s 2016 Fuel Economy Guide give the regression
line
highway mpg=7.903+(0.993×city mpg)
for predicting highway mileage from city mileage.
(a) What is the slope of this line? (Enter your answer rounded
to three decimal places.)
slope:
What does the numerical value of the slope tell you?
On average, highway mileage increases by 0.993 mpg for each...

We expect a car’s highway gas mileage to be related to its city
gas mileage (in mpg). Data for all 1209 vehicles in the
government’s 2016 Fuel Economy Guide give the regression
line
highway mpg=7.903+(0.993×city mpg)
for predicting highway mileage from city mileage.
(a) What is the slope of this line? (Enter your answer rounded
to three decimal places.)
slope:
What does the numerical value of the slope tell you?
On average, highway mileage decreases by 0.993 mpg for each...

A car manufacturer claims that its cars make on average 30 miles
per gallon on a highway. A consumer group tests 25 cars on a
highway and finds the average of 27 miles per gallon and a standard
deviation of 5.81 miles per gallon. Do these results doubt the
claim made by the car manufacturer about the population mean μ?
Test the hypotheses H0: μ =30 versus Ha:μ ≠ 30 at 0.05 level of
significance.
Suppose that a test of...

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