chlorsulfuron: Chlorsulfuron Data

In nlreg: Higher Order Inference for Nonlinear Heteroscedastic Models

Description

The chlorsulfuron data frame has 51 rows and 3 columns.

Bioassay on the action of the herbicide chlorsulfuron on the callus area of colonies of Brassica napus L. The experiment consists of 51 measurements for 10 different dose levels. The design is unbalanced: the number of replicates per dose varies from a minimum of 5 to a maximum of 8.

Usage

data(chlorsulfuron)

Format

This data frame contains the following columns:

group

indicator variable for each tested dose;

dose

the tested dose (nmol/l);

area

the callus area (mm^2).

Source

The data were obtained from

Seiden, P., Kappel, D. and Streibig, J. C. (1998) Response of Brassica napus L. tissue culture to metsulfuron methyl and chlorsulfuron. Weed Research, 38, 221–228. Dataset C3.

References

Bellio, R., Jensen, J.E. and Seiden, P. (2000). Applications of likelihood asymptotics for nonlinear regression in herbicide bioassays. Biometrics, 56, 1204–1212.

Brazzale, A. R. (2000) Practical Small-Sample Parametric Inference. Ph.D. Thesis N. 2230, Department of Mathematics, Swiss Federal Institute of Technology Lausanne. Section 5.3, Example 8.

Examples

data(chlorsulfuron)
attach(chlorsulfuron)
plot(dose, area, xlab = "tested dose (nmol/l)", 
     ylab = "log callus area (mm^2)", log = "y")
detach()

nlreg documentation built on May 1, 2019, 9:21 p.m.