noEffect: Testing if there is a dose effect at all
In drc: Analysis of Dose-Response Curves

Description Usage Arguments Details Value Author(s) Examples

A significance test is provided for the comparison of the dose-response model considered and the simple linear regression model with slope 0 (a horizontal regression line corresponding to no dose effect)

1	noEffect(object)

object

an object of class 'drc'.

Perhaps useful for screening purposes.

The likelihood ratio test statistic and the corresponding degrees of freedom and p-value are reported.

Christian Ritz

ryegrass.LL.4 <- drm(rootl ~ conc, data = ryegrass, fct = LL.4())

noEffect(ryegrass.LL.4)
# p-value < 0.0001: there is a highly significant dose effect!