Pollutants in Auto Exhaust The level of nitrogen oxides (NOx) in the exhaust of
ID: 3052855 • Letter: P
Question
Pollutants in Auto Exhaust The level of nitrogen oxides (NOx) in the exhaust of cars is a major source of air pollution, especially in large cities. Government regulations call for NOx emissions to be no higher than 0.3 grams/mile. A company has 25 cars of a particular model in its fleet. The company President wants to know if the average NOx level of these cars differs from the 0.3 g/mi limit. The data for the NOx emissions for the 25 cars is below: A. Identify the variables (include units where appropriate, independent (explanatory) variable/dependent (response), quantitative or qualitative) Identify which hypothesis test would be appropriate to analyze the data. To date, we have learned about the following: One Sample t test, Two Sample Dependent t test, Two Sample Independent t test, and One-way ANOVA) Hint: Use the "Which Test" flow chart to determine which test would be appropriate. B.Explanation / Answer
A ) Dependent variable ------------- Level of nirogen oxides in the exhaust of cars ( grams / mile ) . It is a quantitative variable .
B ) One sample t test would be appropriate for this problem .