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2. Fueleconomy.gov gives the city and highway fuel economy for all makes and models of
vehicles back to 1984. The scatterplot displays the city and highway fuel economy (mpg)
for a random sample of ten 2021 vehicles.
14.4 24.3 27.2 29.9 20.4 28.8 20.9 23.2 28.6 25.4
City fuel economy
(mpg)
Highway fuel
economy (mpg)
25.5 37.4 36.5 45.5 28.7 46.1 33.6
38.3 41.3 35.3
a. The correlation between city fuel
economy and highway fuel economy
for these 10 vehicles is r = 0.917.
Interpret this value.
44-
42-
40-
38-
30-
34
32
10-
25-
b. If fuel economy was measured in feet
per gallon, rather than miles per
gallon how would the value of the correlation be affected? Explain.
15
14
18
20
City fuel economy (mg)
Date:
33 10
c. The Rolls-Royce Ghost EWB gets 14.4 city mpg and 25.5 highway mpg. What affect
does this point have on the correlation? Explain.
2. Fueleconomy.gov gives the city and highway fuel economy for all makes and models of
vehicles back to 1984. The scatterplot displays the city and highway fuel economy (mpg)
for a random sample of ten 2021 vehicles.
14.4 24.3 27.2 29.9 20.4 28.8 20.9 23.2 28.6 25.4
City fuel economy
(mpg)
Highway fuel
economy (mpg)
25.5 37.4 36.5 45.5 28.7 46.1 33.6
38.3 41.3 35.3
a. The correlation between city fuel
economy and highway fuel economy
for these 10 vehicles is r = 0.917.
Interpret this value.
44-
42-
40-
38-
30-
34
32
10-
25-
b. If fuel economy was measured in feet
per gallon, rather than miles per
gallon how would the value of the correlation be affected? Explain.
15
14
18
20
City fuel economy (mg)
Date:
33 10
c. The Rolls-Royce Ghost EWB gets 14.4 city mpg and 25.5 highway mpg. What affect
does this point have on the correlation? Explain.
