In many animals, reproduction may compromise a females ability to fight off diseases, due to the amount of energy she must invest in her offspring. In a study by Oppliger et al. (1996) on the great tit Parus major, two treatments were established. In the egg removal treatment, a single egg was permanently removed from each clutch; in the control treatment, a single egg was briefly removed (for 30 sec) and then replaced in the clutch. The researchers then recorded whether a malarial parasite was present or absent in the female after all offspring had hatched. These were the data obtained:

Control Egg Removal

Malaria	7	15
No Malaria	28	15

A. Use either a chi-square test of independence or a G-test of independence to analyze your data. You must provide your row and column totals and your expected values. Be sure to interpret your results and explain your reasons for declaring them significant or not significant.

B. Either the row totals or the column totals have been fixed by the researchers. Which one has been fixed, and explain why you think this?

C. Use either Williams correction or Yates correction to adjust the test statistic from part A. You must show your work on this to get full credit!