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1.a) The number of pollutants (in lbs.) that are released into the air each year was collected. The EPAbelieves that for some plants this average

1.a) The number of pollutants (in lbs.) that are released into the air each year was collected. The EPAbelieves that for some plants this average is 142 with a standard deviation of 12.What is theprobability that this random sample generates a sample average greater than 144

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