Question: A chain of stores suspects that coupons will increase sales to customers in its frequent shopper program. To test this theory, the chain mails some

A chain of stores suspects that coupons will increase sales to customers in its frequent shopper program. To test this theory, the chain mails some customers coupons and does not send these coupons to others. A manager builds a contingency table of two variables: whether the customer was sent a and whether the customer used the in the store. Both variables have Yes/No values. Must the manager fnd association?

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