The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.4 ppm and standard deviation 1.4 ppm. 6 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X N( b. What is the distribution of a? a - N( c. What is the probability that one randomly selected city's waterway will have more than 8.7 ppm pollutants?
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In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
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Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
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![The amount of pollutants that are found in waterways near large cities is normally distributed with mean
9.4 ppm and standard deviation 1.4 ppm. 6 randomly selected large cities are studied. Round all answers to
4 decimal places where possible.
a. What is the distribution of X? X - N(
b. What is the distribution of x? a - N(
c. What is the probability that one randomly selected city's waterway will have more than 8.7 ppm
pollutants?
d. For the 6 cities, find the probability that the average amount of pollutants is more than 8.7 ppm.
e. For part d), is the assumption that the distribution is normal necessary? O YesO No
f. Find the IQR for the average of 6 cities.
Q1 =
ppm
Q3 =
ppm
IQR:
ppm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8bd92b17-03bc-4747-bcee-c663e2b410a6%2F06da65ed-f840-4ed5-bdf5-c76e602c4094%2Fpduff6u_processed.jpeg&w=3840&q=75)
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