Question 7 The Environmental Protection agency requires that the exhaust of each model of motor vehicle Type numbers in
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Question 7 The Environmental Protection agency requires that the exhaust of each model of motor vehicle Type numbers in
Question 7 The Environmental Protection agency requires that the exhaust of each model of motor vehicle Type numbers in the boxes. be tested for the level of several pollutants. The level of oxides of nitrogen (NOX) in the exhaust Part 1: 5 points of one light truck model was found to vary among individually trucks according to a Normal Part 2: 5 points distribution with mean 1.45 grams per mile driven and standard deviation 0.40 grams per mile. 10 points (a) What is the 20th percentile for NOX exhaust, rounded to four decimal places? (b) Find the interquartile range for the distribution of NOX levels in the exhaust of trucks rounded to four decimal places.