Automobile Emissions Are Statistically Gamma Distributed
Chemistry and Biochemistry
In the present study, we investigated the statistical distributions of on-road CO and HC emissions by comparing the skewness and kurtosis of the distributions. The results of the analysis based on remote sensing data sets show that on-road automobile CO and HC emission distributions are well represented by a gamma-distribution. Laboratory dynamometer emissions measurements are similarly distributed, thus the classical statistics based on the assumptions of normal distributions cannot be applied.
Zhang, Y.; Bishop, G. A.; Stedman, D. H., Automobile emissions are statistically gamma distributed. Environ. Sci. Technol. 1994, 28, 1370-1374, DOI: 10.1021/es00056a029.
Copyright held by the American Chemical Society.