Question
In: Statistics and Probability
The Environmental Protection agency requires that the exhaust of each model of motor vehicle be tested...
The Environmental Protection agency requires that the exhaust of each model of motor vehicle be tested for the level of several pollutants. The level of oxides of nitrogen (NOX) in the exhaust of one light truck model was found to vary among individually trucks according to a Normal distribution with mean 1.45 grams per mile driven and standard deviation 0.40 grams per mile.
(a) What is the 30th percentile for NOX exhaust, rounded to four decimal places?
(b) Find the interquartile range for the distribution of NOX levels in the exhaust of trucks rounded to four decimal places.
Solutions
orchestra answered 2 years agoRelated Solutions
The Environmental Protection agency requires that the exhaust of each model of motor vehicle be tested...
The Environmental Protection agency requires that the exhaust of
each model of motor vehicle be tested for the level of several
pollutants. The level of oxides of nitrogen (NOX) in the exhaust of
one light truck model was found to vary among individually trucks
according to a Normal distribution with mean 1.45 grams per mile
driven and standard deviation 0.40 grams per mile.
(a) What is the 66th percentile for NOX exhaust, rounded to four
decimal places?
(b) Find the...
5)The Environmental Protection agency requires that the exhaust of each model of motor vehicle be tested...
5)The Environmental Protection agency requires that the exhaust
of each model of motor vehicle be tested for the level of several
pollutants. The level of oxides of nitrogen (NOX) in the exhaust of
one light truck model was found to vary among individually trucks
according to a Normal distribution with mean 1.45 grams per mile
driven and standard deviation 0.40 grams per mile. (a) What is the
20th percentile for NOX exhaust, rounded to four decimal places?
(b) Find the...
The Environmental Protection agency requires that the exhaust of each model of motor vehicle be tested for the level of several pollutants.
The Environmental Protection agency requires that the exhaust of each model of motor vehicle be tested for the level of several pollutants. The level of oxides of nitrogen (NOX) in the exhaust of one light truck model was found to vary among individually trucks according to a Normal distribution with mean 1.45 grams per mile driven and standard deviation 0.40 grams per mile.
(a) What is the 70th percentile for NOX exhaust, rounded to four decimal places?
(b) Find...
forty new automobile were tested for fuel efficiency by the Environmental protection Agency (in mile per...
forty new automobile were tested for fuel efficiency by the
Environmental protection Agency (in mile per gallon). The
individual values and frequency distribution are displaced
below.
24, 19 22 29 17 31 27 33 27 18
32 24 34 23 31 23 24 8 34 34
23 32 17 22 23 18 31 23 23 30
19 26 31 19 37 23 16 26 30 31
CLSS FREQUECY
8-12 1
13-17 3
18-22 8
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28-32 ...
The Environmental Protection Agency (EPA) requires that cities monitor over 80 contaminants in their drinking water....
The Environmental Protection Agency (EPA) requires that cities
monitor over 80 contaminants in their drinking water. Samples from
the Lake Huron Water Treatment Plant gave the results shown here.
All observations were below the allowable maximum, as shown by the
reported range of contaminant levels. (presumably the mean would be
the midrange).
Substance Range Detected
Allowable MAX Origin of
Substance
Chromium 0.44 to
0.57
100
Discharge from steel and pulp mills, natural erosion
Barium 0.007 to
0.020
2
Discharge from...
In its Fuel Economy Guide for 2014 model vehicles, the Environmental Protection Agency gives data on...
In its Fuel Economy Guide for 2014 model vehicles, the
Environmental Protection Agency gives data on 1134 vehicles. The
combined city and highway gas mileage of these 1134 vehicles is
approximately Normal with mean 22.2 miles per gallon (mpg) and
standard deviation 5.2 mpg. (a) The 2014 Volkswagen Beetle with a
four-cylinder 1.8 L engine and automatic transmission has combined
gas milage of 28 mpg. What percent of all vehicles have better gas
mileage than the Beetle? (b) How high...
In its Fuel Economy Guide for 2008 model vehicles, the Environmental Protection Agency gives data on...
In its Fuel Economy Guide for 2008 model vehicles, the
Environmental Protection Agency gives data on 1152 vehicles. There
are a number of outliers, mainly vehicles with very poor gas
mileage. If we ignore the outliers, however, the combined city and
highway gas mileage of the other 1120 or so vehicles is
approximately Normal with mean 18.7 miles per gallon (mpg) and
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In its Fuel Economy Guide for 2016 model vehicles, the Environmental Protection Agency provides data on...
In its Fuel Economy Guide for 2016 model vehicles, the
Environmental Protection Agency provides data on 11701170 vehicles.
There are a number of high outliers, mainly hybrid gas‑electric
vehicles. If we ignore the vehicles identified as outliers,
however, the combined city and highway gas mileage of the other
11461146 vehicles is approximately Normal with mean 23.023.0 miles
per gallon (mpg) and standard deviation 4.94.9 mpg.
The quartiles of any distribution are the values with cumulative
proportions 0.250.25 and 0.75.0.75. They...
1) The Environmental Protection Agency was created in 1970 to mount a coordinated attack on environmental...
1) The Environmental Protection Agency was created in 1970 to
mount a coordinated attack on environmental problems. Its duties
primarily include
Multiple Choice
providing financial assistance to the private sector to find
alternative sources of energy.
assisting state and local pollution control efforts.
assessing fines against businesses for violating the
Environmental Protection Act.
drafting agreements between the United States and its trading
partners concerning the environmental effects of international
trade.
2)
The Clean Air Act of 1990 has all but...
An environmental chemist working for the Environmental Protection Agency (EPA) was directed to collect razor clams...
An environmental chemist working for the Environmental
Protection Agency (EPA) was directed to collect razor clams from a
heavily-contaminated river superfund site and analyze them for
their Cd2 content using graphite furnace atomic absorption
spectrometry (GFAAS). The chemist dried the clams at 95° C
overnight and ground them in a scientific blender, resulting in
approximately 50 g of homogenized dry weight. A representative
69.58 mg sample was taken from the approximately 50 g of dry
material and dissolved in 100.0...
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