Vol: 32 Page: 205

Authors:
Joanna Tarasińska

Title:
 Application of analysis of cavariance in researches of biofuels' influence on the level of smokiness of exhaust gas

Language: Polish

Keywords:
analysis of covariance
adjusted means
interaction between factor and covariate
analysis of contrasts between factor levels

Summary:
The model of ANCOVA is applied for researches of biofuels’ influence on the level of smokiness of exhaust gas of an engine. The engine’s power is the covariate. The model with nonparallel regression curves is found, the estimators of its parameters are given and analysis of contrasts between factor levels is conducted.