curvilinear trend


Also found in: Encyclopedia.

curvilinear trend

Etymology: L, curvus, bent, linea, line; AS, trendan, to turn
(in statistics) a trend in which a graphic representation of the data yields a curved line. The value of the independent variable may be expressed as a polynomial coefficient; by a more complete mathematic expression, such as a logistic curve; or by a smoothing process, such as a moving average.
References in periodicals archive ?
Mean captures of all species as a group showed a significant curvilinear trend over time with an early peak in year 3-4 followed by decline (Fig.
Human PCB determinations presented in Figure 1 show a curvilinear trend.
A visual inspection of this data plotting strongly reinforces the curvilinear pattern that was concluded previously and demonstrates that the curvilinear trend line was in fact a reasonable and adequate representation of actual market behavior.