Boeing 747 travels at 572 miles per hour.these massive machines
burn 1.1 gal jet fuel per...
Boeing 747 travels at 572 miles per hour.these massive machines
burn 1.1 gal jet fuel per second. Given that density of jet fuel
0.811 gal/ml determine kg of fuel burned per mile
fuel consumption for a Boeing 747 commercial jet in cruising
position has an approximately normal distribution with a mean of
3212 gallons of jet fuel per hour at a standard deviation of 175
gallons of jet fuel per hour
a) fuel consumption of a boeing in cruising position is in the
lower 20% of the distribution the plane is used for economy trips
find the maximum fuel consumption in gallons per hour required for
a Boeing 747 in cruising position...
A Boeing 747 "Jumbo Jet" has a length of 64.4 m. The runway on
which the plane lands intersects another runway. The width of the
intersection is 23.6 m. The plane decelerates through the
intersection at a rate of 5.50 m/s2 and clears it with a final
speed of 46.9 m/s. How much time is needed for the plane to clear
the intersection?
A transportation engineer is studying the distribution of fuel
efficiencies (measured in miles per gal- lon, or mpg) for vehicles
registered in Franklin county. Let Y denote the efficiency of a
vehicle in mpg. The researcher models vehicle efficiency as
following a normal distribution (i.e., the popula- tion
distribution is normal) and randomly samples n = 16 vehicles from
the population. The sample mean is y ̄ and the sample standard
deviation is s. Answer the following questions. (If the...
Fuel consumption is commonly measured in miles per gallon
(mi/gal). An agency designed new fuel consumption tests to be used
starting with 2008 car models. Listed below are randomly selected
amounts by which the measured MPG ratings decreased because of the
new 2008 standards. Find the range, variance, and standard
deviation for the sample data. Is the decrease of 4 mi/gal
unusual? Why or why not?
22
11
33
22
44
11
33
22
22
22
22
22
11
22 ...
The fuel consumption, in miles per gallon, of all cars of a
particular model has a mean of 25 and a standard deviation of 2.
The population distribution can be assumed as normal. A random
sample of these cars is taken.
a. Find the probability that the sample mean fuel consumption
will be fewer than 24 miles per gallon if (i) a sample of 1
observation is taken, (ii) a sample of 4 observations if taken and
(iii) a sample...
The National Association of Truck Drivers claims that the
average truck driver travels 60000 miles per year. The population
standard deviation of the mileage is 5000 miles. The Connecticut
Valley Trucking Corporation surveyed 48 Truck Drivers and found the
mean mileage for its Truck Drivers was 59500 miles driven per year.
Is Connecticut Valley’s mileage different from that claimed by the
National Association of Truck Drivers at the .05 significance
level?
The fuel efficiency, measured in miles per gallon, was measured
for each of 12 cars when the cars where brand new. After exactly 5
years of use, the fuel efficiency of the same 12 cars was measured
again. The data is in the following table. Mileage when New Mileage
after 5 years Difference 16 15 1 27 24 3 17 17 0 33 29 4 28 25 3 24
22 2 18 16 2 22 20 2 20 21 -1...
Listed below are the combined city – highway fuel consumption
ratings (in miles per gallons) for different cars measured in old
rating system and cars in a new rating system introduced in 2008
(based on data from USA today).
A. Construct a 90 percent confidence interval of the difference
in the ratings of cars.
Old Rating: 16 18 27 17 33 28 33 18 24 19 18 27 22 18 20 29 19
27 20 21
New Rating: 15 16...
Two types of engines are tested for fuel efficiency based on
miles per gallon. A sample of 31 cars were tested with Brand X and
the mean was 20.9 mpg with a standard deviation of 1.8 mpg. 31 cars
tested with Brand Y had a mean of 17.6 mpg and a standard deviation
of 1.2 mpg. Test the claim that Brand X is more efficient than
Brand Y. Use a 0.05 significance level.
Using the data from Problem #1, calculate...
5. Suppose that a car manufacturer claims that its
fuel efficiency (as measured in miles per
gallon) per tankful of gasoline follows a normal distribution with
mean 35 mpg and
standard deviation 2.0 mpg.
a) What percentage of tankfuls would obtain between 30 and 40 mpg?
(A table of
standard normal probabilities appears at the end of this
exam.)
b) Would the percentage of tankfuls that obtain between 30 and 40
mpg be larger,
smaller, or the same if the...