A survey found that the favorite color of everyone who bought a vehicle overall is silver. In this case, should a new car dealer order most pick-up trucks to stock on its lot in silver? A chain of...

A survey found that the favorite color of everyone who bought a vehicle overall is silver. In this case, should a new car dealer order most pick-up trucks to stock on its lot in silver?

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 coupon and whether the customer used the coupon in the store. Both variables have Yes/No values. Must the manager find association?