H0: = 0 versus Ha: < 0 where pD = the proportion of all dogs that can be trained to fetch a ball and pC = the proportion of all cats that can be trained to fetch a ball.
B
H0: = 0 versus Ha: < 0 where pD = the sample proportion of all dogs that can be trained to fetch a ball and pC = the sample proportion of all cats that can be trained to fetch a ball.
C
H0: = 0 versus Ha: > 0 where pD = the proportion of all dogs that can be trained to fetch a ball and pC = the proportion of all cats that can be trained to fetch a ball.
D
H0: = 0 versus Ha: > 0 where pD = the sample proportion of all dogs that can be trained to fetch a ball and pC = the sample proportion of all cats that can be trained to fetch a ball.