3. Nave blue jays will try to eat any number of things; however, once they have a bad experience with a particular prey item, they are less likely to attempt to eat it again. In a famous experiment, Lincoln Brower fed monarch butterflies to blue jays. Monarchs are distasteful and poisonous. You decide to perform a similar experiment. You offer one group of jays experience with a butterfly: they all eat the butterfly and subsequently vomit (the "barfers"). The second group of jays is nave and has only eaten bird food. You then test each group with a monarch.

EAT REJECT

# of barfers 4 7

# of nave birds 10 0

1. (1 pt) What test should you use?

1. (3 pts). Show your test statistic and p value. What can you conclude?

c. (3 pts).Redesign the experiment so a Mann-Whitney U or Wilcoxon rank-sum test would be appropriate.

d. (3 pts). Redesign the experiment so a Wilcoxon matched-pair signed-rank test would be appropriate.