rat {BayesGOF} | R Documentation |

## Rat Tumor Data

### Description

Incidence of endometrial stromal polyps in `k=70`

studys of female rats in control group of a 1977 study on the carcinogenic effects of a diabetic drug phenformin. For each of the `k`

groups, `y`

represents the number of rats who developed the tumors out of `n`

total rats in the group.

### Usage

`data("rat")`

### Format

A data frame of `(y_i, n_i)`

for `i = 1,...,70`

.

`y`

number of female rats in the `i^{th}`

study who developed polyps/tumors

`n`

total number of rats in the `i^{th}`

study

### Source

National Cancer Institute (1977), "Bioassay of phenformin for possible carcinogenicity," *Technical Report No. 7*.

### References

Gelman, A., Carlin, J.B., Stern, H.S., Dunson, D.B., Vehtari, A., and Rubin, D.B., 2014. *Bayesian Data Analysis* (Vol. 3). Boca Raton, FL: CRC press.

Tarone, R.E., 1982. "The use of historical control information in testing for a trend in proportions," *Biometrics*, pp. 215-220.

[Package

*BayesGOF* version 5.2

Index]