rats: Rats Diet Experiment
In aod: Analysis of Overdispersed Data
rats R Documentation
Rats Diet Experiment
Description
“Weil (1970) in Table 1 gives the results from an experiment comprising two treatments. One group of
16 pregnant female rats was fed a control diet during pregnancy and lactation, the diet of a second group of 16 pregnant
females was treated with a chemical. For each litter the number n of pups alive at 4 days and the number x
of pups that survived the 21 day lactation period were recorded.” (Williams, 1975, p. 951).
Usage
data(rats)
Format
A data frame with 32 observations on the following 3 variables.
- group
A factor with levels CTRL and TREAT
- n
A numeric vector: the number of pups alive at 4 days.
- y
A numeric vector: the number of pups that survived the 21 day lactation.
Source
Williams, D.A., 1975. The analysis of binary responses from toxicological experiments
involving reproduction and teratogenicity. Biometrics 31, 949-952.
References
Weil, C.S., 1970. Selection of the valid number of sampling units and a consideration of their combination
in toxicological studies involving reproduction, teratogenesis or carcinogenesis. Fd. Cosmet. Toxicol. 8, 177-182.
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| rats | R Documentation |
Rats Diet Experiment
Description
“Weil (1970) in Table 1 gives the results from an experiment comprising two treatments. One group of
16 pregnant female rats was fed a control diet during pregnancy and lactation, the diet of a second group of 16 pregnant
females was treated with a chemical. For each litter the number n of pups alive at 4 days and the number x
of pups that survived the 21 day lactation period were recorded.” (Williams, 1975, p. 951).
Usage
data(rats)Format
A data frame with 32 observations on the following 3 variables.
- group
A factor with levels
CTRLandTREAT- n
A numeric vector: the number of pups alive at 4 days.
- y
A numeric vector: the number of pups that survived the 21 day lactation.
Source
Williams, D.A., 1975. The analysis of binary responses from toxicological experiments involving reproduction and teratogenicity. Biometrics 31, 949-952.
References
Weil, C.S., 1970. Selection of the valid number of sampling units and a consideration of their combination in toxicological studies involving reproduction, teratogenesis or carcinogenesis. Fd. Cosmet. Toxicol. 8, 177-182.
R Package Documentation
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