the product. The purchase potential ratings were based on a O to 10 scale, with higher values indicating a higher purchase potential. Can it be claimed that the commercial improved the purchase potential rating? Use a: O 05 and the following data to test the value of the commercial. Consider 'before' ratings as population 1. The standard deviation of the differences in the sample is 1.195. Pase provide the statements for all of the following_parts. Maintain the exact sequence and do not merge the parts. There is no need to type formulae and c culation steps #5051an PurchaseRating Individual Before After 1 ______ ______ _____6_____ 2 ______ 4 ______ _5_________ 3 7 E 7 _____________ 4 ______ 3 ______ i_____4_____ s ______ 5 ______ _3_________ 6 ______ 8 ______ i_____9_____ 7 ______ 57 8 6 6 Hypotheses: Critical value(s): (State whether it is a z or a t value.) Decision rule (under what condition H0 should be rejected): Test statistic: (State whether it is a z or a t statistic.) Decision (Reject H0 or not): Decision interpretation