SRAssay {mratios}

Slope ratio assay of panthotenic acid contents in plant tissues

Description

Content of panthotenic acid in a standard and three unknown samples were measured. The response variable is the titer of a sample to pH 6.8.

Usage

data(SRAssay)

Format

A data frame with 34 observations on the following 3 variables.

Response

a numeric vector, containing the response variable (titer to pH 6.8)

Treatment

a factor with levels St, U1, U2 and U3, specifying the standard and 3 unknown samples, respectively

Dose

a numeric vector

Source

Jensen, D.R. (1989). Joint confidence sets in multiple dilution assays. Biometrical Journal 31, 841-853.

References

Data originally from Bliss, C.I. (1952). The Statistics of Bioassay. Academic Press, New York.

Examples

library(mratios)

data(SRAssay)

str(SRAssay)

plot(Response~Dose, data=SRAssay)

# library(lattice)
# xyplot(Response~Dose|Treatment, data=SRAssay)

# see ?sci.ratio.gen for  the analysis of this dataset