nlreg (version 1.2-2.2)

chlorsulfuron: Chlorsulfuron Data

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 (\(mm^2\)).

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

# NOT RUN {
data(chlorsulfuron)
attach(chlorsulfuron)
plot(dose, area, xlab = "tested dose (nmol/l)", 
     ylab = "log callus area (mm^2)", log = "y")
detach()
# }