Consumers were surveyed on the relative number of visits to a Sears

store (often, occa-sional, and never) and if the store was located in an

enclosed mall (yes and no). When variables are measured nominally,

such as these data, the results are usually summarized in contingency

table. (10 marks )

i. Are the number of visits and enclosed mall variables independent?

Why? Interpret your conclusion.

ii. Draw a tree diagram and determine the conditional probabilities.