Problem 2 – The Environmental Protection Agency (EPA) is concerned about pollution caused by factories that...

Problem 2 – The Environmental Protection Agency (EPA) is concerned about pollution caused by factories that burn sulfur-rich fuel. In order to decrease the impact on the environment, factory chimneys must be high enough to allow pollutants to dissipate over a larger area. Assume that the mean height of chimneys in these factories is 100 meters (an EPA acceptable height) with standard deviation 12 meters. Use the appropriate Excel function to calculate each of the following. (Note – Part (b) will be answered by-hand.)

(b) Write your answer for Part (b) directly on the output.
Suppose that the heights of all individual chimneys in the population vary according to an unknown distribution. Suppose that samples of 40 chimneys will be selected and the mean height of each sample, ?̅, will be recorded. What will be the shape of the sampling distribution of the ?̅ values? How do we know this?
(c) Find the probability that the mean height for a sample of 40 chimneys is greater than 102 meters.
(d) Find the probability that the mean height for a sample of 40 chimneys is between 101 and 103

meters.

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

i will rate The Environmental Protection Agency (EPA) is concerned about pollution caused by factories that...

i will rate The Environmental Protection Agency (EPA) is concerned about pollution caused by factories that burn sulfur-rich fuel. In order to decrease the impact on the environment, factory chimneys must be high enough to allow pollutants to dissipate over a larger area. Assume that the mean height of chimneys in these factories is 100 meters (an EPA acceptable height) with standard deviation 12 meters. Use the appropriate Excel function to calculate each of the following. (Note – Part (b)...

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...

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 cadmium (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 ~ 50 g of homogenized dry weight. A representative 91.65 mg sample was taken from the ~ 50 g of dry material and dissolved in...

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 cadmium (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 ~ 50 g of homogenized dry weight. A representative 91.65 mg sample was taken from the ~ 50 g of dry material and dissolved in...

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 73.11 mg sample was taken from the approximately 50 g of dry material and dissolved in 100.0...

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 cadmium (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 ~ 50 g of homogenized dry weight. A representative 64.00 mg sample was taken from the ~ 50 g of dry material and dissolved in...

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 cadmium (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 ~ 50 g of homogenized dry weight. A representative 64.00 mg sample was taken from the ~ 50 g of dry material and dissolved in...

A method used by the Environmental Protection Agency (EPA) for determining the concentration of ozone in...

A method used by the Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the air sample through a "bubbler" containing sodium iodide, which removes the ozone according to the following equation: O3(g)+2NaI(aq)+H2O(l)→O2(g)+I2(s)+2NaOH(aq) Part A) How many moles of sodium iodide are needed to remove 5.95×10−6 mol O3? Part B) How many grams of sodium iodide are needed to remove 2.1 mg of O3?

The Environmental Protection Agency (EPA) wants to investigate the value workers place on being able to...

The Environmental Protection Agency (EPA) wants to investigate the value workers place on being able to work in “clean” mines over “dirty” mines. The EPA conducts a study and finds the average annual wage in clean mines to be $42,250 and the average annual salary in dirty mines to be $47,250. If the probability of fatal lung disease after 10 years of work in a dirty mine is 3%, and is 1% in the clean mine, what is the statistical value of...

Please critique the following experimental design: An ecologist with the Environmental Protection Agency (EPA) wants to...

Please critique the following experimental design: An ecologist with the Environmental Protection Agency (EPA) wants to investigate the effects of acid rain on the reproductive output of mustard plants. The scientist grows 1 mustard seed in mildly acidic water (pH = 6) and 1 mustard seed in neutral water (pH = 7). The temperature and photoperiod was kept the same between both treatment and control. All plants were given 40 days to develop to seed.

Subjects