Reread Section 11.4.5, which contains a discussion of methodological problems in a study...

Reread Section 11.4.5, which contains a discussion of methodological problems in a study of the effects of FD&C Red No. 40. The following tables give the numbers of mice that developed RE tumors in each of several groups:

Use chi-square tests to compare the incidences in the different groups for males and for females. Which differences are significant? What would you conclude from this analysis had you not known about the possibility of cage position effects?