Question
In: Statistics and Probability
A fuel consumption study is conducted for two types of automobiles. One representative vehicle of each...
A fuel consumption study is conducted for two types of automobiles. One representative vehicle of each type is selected, and the mileage performance is observed for 10 tanks of fuel in each car. The data obtained, expressed in miles per gallon (mpg), are as follows:
Car 1: 24.7 24.9 24.8 24.6 24.9 23.9 24.7 24.9 24.5 24.6
Car 2: 41.7 42.8 42.3 42.4 41.6 39.9 39.5 40.8 41.9 39.6
a) Using the appropriate distribution model and a 95% confidence interval, is there evidence to support the claim that the variability in mileage performance is greater for Car 2 than for Car 1?
b) Solve this problem again using the related hypothesis-testing procedure.
Solutions
Expert Solution
a)
Confidence interval doesn't contain zero therefore claim is true that the variability in mileage performance is greater for Car 2 than for Car 1?
b)
orchestra answered 2 years agoRelated Solutions
A study is conducted concerning automobile speeds and fuel consumption rates. The following data is collected: &
A study is conducted concerning automobile speeds and fuel
consumption rates. The following data is
collected:
X
Speed 45 52 49 60 67 61
Y
MPG 22 26 21 28 33 32
Draw Scatter plot
Compute the coefficient of correlation, and make a comment
about that.
Compute the coefficient of determination, and make a comment
about that.
Compute the coefficient of Non- determination, and make a
comment about that.
Find Regression Line and make a comment about that. Also, at
what location the line crosses the
y-axis.
What is the “Residual’ at...
A study is conducted concerning automobile speeds and fuel consumption rates. The following data is collected: &
A study is conducted concerning automobile speeds and fuel
consumption rates. The following data is
collected:
X
Speed 45 52 49 60 67 61
Y
MPG 22 26 21 28 33 32
Draw Scatter plot
Compute the coefficient of correlation and make a comment about
that.
Compute the coefficient of determination and make a comment
about that.
Compute the coefficient of Non- determination and make a
comment about that.
Find Regression Line and make a comment about that. Also, at
what location the line
crosses the
y-axis.
What is the “Residual’ at...
Two automobiles with equal mass approach an intersection. One vehicle is traveling eastward and the other...
Two automobiles with equal mass approach an
intersection. One vehicle is traveling eastward and the other
vehicle is traveling northward. The vehicles collide and
stick together. After impact they travel on the road and then
travel on a gravel covered shoulder until both cars stop. Only the
northward bound vehicle left skid marks at an angle of 55 degrees
north of east. A police officer posted at the intersection
clocked the eastward vehicle at 29 mph before impact. The northward...
Two automobiles with equal mass approach an intersection. One vehicle is traveling eastward and the other...
Two automobiles with equal mass approach an intersection. One
vehicle is traveling eastward and the other vehicle is traveling
northward. The vehicles collide and stick together. After impact
they travel on the road and then travel on a gravel covered
shoulder until both cars stop. Only the northward bound vehicle
left skid marks at an angle of 55 degrees north of east. A police
officer posted at the intersection clocked the eastward vehicle at
29 mph before impact. The northward...
Table 14 Average rate of fuel consumption, by year of manufacture by type of vehicle by...
Table 14 Average
rate of fuel consumption, by year of manufacture by type of vehicle
by type of fuel
Petrol
Petrol - RSE
Diesel
Diesel - RSE
LPG/CNG/dual fuel/hybrid and other
LPG/CNG/dual fuel/hybrid and other -
RSE
Total
Total - RSE
l/100 km
%
l/100 km
%
l/100 km
%
l/100 km
%
2000 and earlier
Passenger vehicles
10.9
2.64
12.2
8.93
16.0
24.49
11.4
2.98
Motor cycles
6.0
6.91
0.0
0.00
0.0
0.00
6.0
6.91
Light commercial vehicles
13.3...
Table 6 Average rate of fuel consumption, by state/territory of registration by type of vehicle by...
Table 6 Average
rate of fuel consumption, by state/territory of registration by
type of vehicle by type of fuel
Petrol
Petrol - RSE
Diesel
Diesel - RSE
LPG/CNG/dual fuel/hybrid and other
LPG/CNG/dual fuel/hybrid and other -
RSE
Total fuel
Total fuel - RSE
l/100 km
%
l/100 km
%
l/100 km
%
l/100 km
%
New South Wales
Passenger vehicles
11.0
2.45
10.2
8.27
12.6
13.49
11.0
2.38
Motor cycles
5.5
5.38
0.0
0.00
0.0
0.00
5.5
5.38
Light commercial...
A study was conducted to see whether two types of cars, A and B, took the...
A study was conducted to see whether two types of cars, A and B,
took the same time to parallel park. Seven drivers were randomly
obtained and the time required for each of them to parallel park
(in seconds) each of the 2 cars was measured. The results are
listed below in order of driver (e.g. the first listing for A and B
are driver 1; the second listing driver 2; etc.) Car A: 19, 21.8,
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The data below are from a study conducted by a consumer research group on the fuel...
The data below are from a study conducted by a consumer research
group on the fuel efficiency (rated based on city miles per gallon)
of the 30 top-selling U.S. automobiles.
23 20 16 13 34 27
24 10 16 12 34 26
14 31 15 12 16 36
18 22 15 19 28 38
10 16 14 23 19 44
1. Enter the data into a spreadsheet. Be sure to clearly label
and neatly format your spreadsheet.
2. Calculate the...
Consider the market for the Toyota Prius, which is a hybrid, fuel efficient vehicle. For each...
Consider the market for the Toyota Prius, which is a hybrid,
fuel efficient vehicle. For each of the following scenarios, use
the supply and demand model to explain how you would expect the
market equilibrium price and quantity traded to change for the
Prius market. You should explain which side of the market (supply,
demand, or possibly both) is likely to be affected, and indicate on
a graph any shifts in the curves that might occur.
(a) The price of...
A traffic study conducted on an interstate highway shows that vehicle speeds (in mph) are normally...
A traffic study conducted on an interstate highway shows that
vehicle speeds (in mph) are normally distributed with a mean of
61.3 and a standard deviation of 3.3.
a) Sketch the distribution of vehicle speeds. Show 3 steps of
standard deviation above and below the mean. b) If a vehicle is
randomly checked, what is the probability that its speed is greater
than 70? Include a sketch. c) If 5 vehicles are randomly sampled,
what is the probability that their...
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