1. Some fish are famously able to develop into either sex, depending on social circumstances. In
one study of a coral reef fish, the goby Gobiodon erythrospilus, researchers placed juvenile fish
with either an adult male or an adult female (Hobbs et al. 2004). Of the 12 juveniles placed with
a male, 11 became female. Of the 10 juveniles placed with an adult female, 6 became male.
1. Should the researchers use a 2 contingency test for this study? Why or why not?
2. Perform all steps of an appropriate hypothesis test to address the biological question of
whether the social context of the juvenile goby fish affects which sex they become.