The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.1 ppm and standard deviation 1.3 ppm. 7 randomly selected large cities are studied. Round all...

The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.1 ppm and standard deviation 1.3 ppm. 7 randomly selected large cities are studied. Round all answers to 4 decimal places where possible.

1. What is the distribution of ¯xx¯? ¯xx¯ ~ N(Correct,)


2. Find the IQR for the average of 7 cities.
   Q1 =  ppm
   Q3 =  ppm
   IQR:  ppm