Vol: 40 Page: 135

Authors:
Andrzej Bochniak
Mirosława Wesołowska-Janczarek

Title:
 On influence of variability in concomitant variables values on estimation of polynomial coefficients in growth curves models with concomitant variables changing in time and the same values for all experimental units

Language: English

Keywords:
growth curve methods
concomitant variables
linear mathematical models
parameter estimation methods
computer simulation

Summary:
Some concomitant variables with values changing in time can have significant influence on estimation of polynomials which describe course of changes for a studied feature in a given time interval. The situation where values of concomitant variables in successive time points are the same for all experimental unit is considered. A difference between values of these variables in time points can be small or large. The question is if exactness of curve estimate is depending on magnitude of these differences. The investigation is carried out on the data obtained by computer simulation.

Display