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s20x (version 3.1-40)

fruitfly.df: Fruitfly Data

Description

This data gives fecundity for female fruitflies, Drosophila melanogaster. The fecundity is the number of eggs laid, per day, for the fruitfly's first 14 days of life. There are three strains: A control group, NS, Nonselected Strain, as well as RS, a strain bred for resistance to DDT and SS, a strain bred for susceptibility to DDT. Each strain contains 25 measurements. It is of interest to compare the level of fecundity across strains.

Arguments

Format

A data frame with 75 observations on 2 variables.

[,1]fecunditynumericNumber of eggs laid, per day, per fruitfly
[,2]strainfactorStrain of fruitfly (NS, RS, SS)

References

Hand, D.J., Daly, F., Lunn, A.D., McConway, K.J. and Ostrowski, E. (1994). A Handbook of Small Data Sets. Boca Raton, Florida: Chapman and Hall/CRC.

Sokal, R.R. and Rohlf, F.J. (1981). Biometry, 2nd edition. San Francisco: W.H. Freeman, 239.