Question

The table below shows whether students in an introductory statistics class like dogs and/or cats.

Doesnt Like Dogs 21 10 Likes Dogs Likes Cats Doesnt Like Cats 194 110

a) What is the marginal distribution (in %) of “liking dogs”?

b) What is the conditional distribution (in %) of “liking dogs” for students who like cats?

c) Do “liking dogs” and “liking cats” appear to be independent? Give statistical evidence to support your conclusion.

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