As part of a study of environmental influences on sex determination in the fish Menidia, eggs from a single mating were divided into two groups and raised in either a warm or a cold environment. It was found that 73 of 141 offspring in the warm environment and 107 of 169 offspring in the cold environment were females. In each of the following chi-square tests, use a non directional alternative and let α = 0.05.
(a) Test the hypothesis that the population sex ratio is 1:1 in the warm environment.
(b) Test the hypothesis that the population sex ratio is 1:1 in the cold environment.
(c) Test the hypothesis that the population sex ratio is the same in the warm as in the cold environment.
(d) Define the population to which the conclusions reached in parts (a)-(c) apply. (Is it the entire genus Menidia?)