Web visualizations

A web visualization that demonstrates the diffferences in power and Type 1 error rates between Welch’s and 2-sample t-tests is here.


R lab

A lab on how to carry out two-sample t-tests in R, and related topics, is available here.


Learn R by example

We used R to analyze all examples in chapter 12. We’ve put the code here so that you can too.


Data

Download a .zip file with all the data for chapter 12 in .csv format here.

Download a .zip file with all data sets in the book here.

All data sets and their sources are listed individually below.

Disclaimer: Most data sets used in the book are grabbed from graphs and tables in the original publications, and the values may not be exact. Contact the original authors for the raw data.


Data for examples

Example 12.2. Blackbird testosterone

Hasselquist, D., J. A. Marsh, P. W. Sherman, and J. C. Wingfield. 1999. Behavioral Ecology and Sociobiology 45: 167–175.

Example 12.3. Horned lizards

Young, A. J., et al. 2006. Proceedings of the National Academy of Sciences (USA) 103: 12005–12010.

Example 12.4. Brook trout vs. salmon

Levin, P. S., S. Achord, B. E. Fiest, and R. W. Zabel. 2002. Proceedings of the Royal Society of London, Series B, Biological Sciences 269: 1663–1670.


Data for problem sets

01. Death and taxes

Kopczuk, W., and J. Slemrod. 2003. The Review of Economics and Statistics 85: 256-265.

8. Cichlids

Haeslery, M. P., and O. Seehausen. 2005. Proceedings of the Royal Society of London, Series B, Biological Sciences 272: 237-245.

9. “Will”s and presidents

Source is unknown.

11. Ostrich temperatures

Fuller, A., et al. 2003. The Journal of Experimental Biology 206: 1171-1181.

13. Iguanas

Wikelski, M., and C. Thom. 2000. Nature 403: 37-38.

15. Mosquitoes and beer

Lefävre, T. 2010. PLoS ONE 5:e9546.

16. Mosquitoes and beer

Lefävre, T. 2010. PLoS ONE 5:e9546.

17. Stalkie eyespan

David, P., T. Bjorksten, K. Fowler, and A. Pomiankowski. 2000. Nature 406: 186-188.

19. Electric fish

Fernandes, C. C., J. Podos, and J. G. Lundberg. 2004. Science 305: 1960-1962.

22. Weddell seal dives

Williams, T. M., L. A. Fuiman, M. Horning, and R. W. Davis. 2004. The Journal of Experimental Biology 207: 973-982.

23. Hyena giggles

Mathevon, N., et al. 2010. BMC Ecology 10:9.

26. Rat reciprocity

Rutte, C., and M. Taborsky. 2007.PLoS Biology 7: 1421-1425.

27. Beer glassware

Attwood, A. S., N. E. Scott-Samuel, G. Stothart, and M. R. Munafò. 2012. PLoS ONE 7:e43007.

28. Spinocerebellar ataxia

Fryer, J. D., et al. 2011. Science 334: 690-693.

29. Mother goats

Briefer, E. F., M. Padilla de la Torre, and A. G. McElligott. 2012. Proceedings of the Royal Society B doi:10.1098/rspb.2012.0986.

30. Lianas

Laurance, W. F., et al. 2014. Ecology 95: 1604-1611.

31. Didgeridoo

Puhan, M. A., et al. 2006. British Medical Journal 2006: 332:266.

33. Rewilding

Leung, J. M., et al. 2018. PLoS Biology 16: e2004108.