A consumer researcher gave consumers a sample shampoo. After using the shampoo, each consumer used an interval-level scale to rate his or her satisfaction with it. Scores could range from 0 to 100, with higher scores indicating greater satisfaction. Consumers didn’t know each other and were randomly assigned to three groups: (1) receive a store brand of shampoo in a bottle clearly labeled as such, (2) receive a premium brand of shampoo in the premium brand’s bottle, or (3) receive a store brand of shampoo in the premium brand’s bottle. Here are the collected data:

Store Brand, Store Bottle Premium Brand, Premium Bottle Store Brand, Premium Bottle 70 85 85 65 90 80 65 95 90 60 90 85 M = 65.00 M = 90.00 M = 85.00 MGiana = 80.00 s = 4.08 s = 4.08 s = 4.08