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gss (version 2.2-8)

nox: NOx in Engine Exhaust

Description

Data from an experiment in which a single-cylinder engine was run with ethanol to see how the NOx concentration in the exhaust depended on the compression ratio and the equivalence ratio.

Usage

data(nox)

Arguments

Format

A data frame containing 88 observations on the following variables.

noxNOx concentration in exhaust.
compCompression ratio.
equiEquivalence ratio.

References

Cleveland, W. S. and Devlin, S. J. (1988), Locally weighted regression: An approach to regression analysis by local fitting. Journal of the American Statistical Association, 83, 596--610.

Breiman, L. (1991), The pi method for estimating multivariate functions from noisy data. Technometrics, 33, 125--160.