A researcher is interested in sex differences in social play in cats. She observes sixteen kittens

(eight male and eight females) and records the sex of the participants in 500 play-bouts, taking a

note of the sex of the animal initiating a bout and the sex of the animal who responds to the

initiation. Are there sex-differences in the kittens' play?

male female initiator of bout: male: 200 150 female: 100 50