Drosophila Melanogaster

Source: R/AgainStart.R

DROSOPHILA contains per diem fecundity (number of eggs laid per female per day for the first 14 days of life) for 25 females from each of three lines of Drosophila melanogaster. The three lines are Nonselected (control), Resistant, and Susceptible.

DROSOPHILA

Format

A data frame with 75 observations on the following 2 variables:

  • fecundity (number of eggs laid per female per day for the first 14 days of life)

  • line (a factor with levels Nonselected, Resistant, and Susceptible)

Source

The original measurements are from an experiment conducted by R. R. Sokal (Biometry by Sokal and Rohlf, 1994, p. 237).

References

  • Sokal, R. R. and Rohlf, F. J. 1994. Biometry. W. H. Freeman, New York, third edition.

  • Ugarte, M. D., Militino, A. F., and Arnholt, A. T. 2015. Probability and Statistics with R, Second Edition. Chapman & Hall / CRC.

Examples

ggplot(data = DROSOPHILA, aes(x = reorder(line, fecundity, FUN = median),  
y = fecundity, fill = line)) + geom_boxplot() + guides(fill = "none") + 
labs(y ="number of eggs laid per female \n per day for the first 14 days of life", 
x = "") + scale_fill_brewer()

ggplot(data = DROSOPHILA, aes(x = reorder(line, fecundity, FUN = median), 
y = fecundity, fill = line)) + geom_violin() + guides(fill = "none") + 
labs(y ="number of eggs laid per female \n per day for the first 14 days of life", 
x = "") + scale_fill_brewer()

summary(aov(fecundity ~ line, data = DROSOPHILA))
#>             Df Sum Sq Mean Sq F value   Pr(>F)    
#> line         2   1362   681.1   8.666 0.000424 ***
#> Residuals   72   5659    78.6                     
#> ---
#> Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1