The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.1 ppm and standard deviation 1.8 ppm. 35 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 ? ¤ - N( c. What is the probability that one randomly selected city's waterway will have more than 9.1 ppm pollutants?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.