14.37 GreenEnergy, a manufacturing company in Finland, wants to know the consumer satisfaction level for two products—A and B. A random sample of 12 consumers are invited to participate in a survey. The participants are divided into two equal groups and are asked to rate the satisfaction they received from each of the two products. The products are then ranked from 1

(extremely unsatisfied) to 10 (extremely satisfied). The participants’ results are shown in the following table.

Test the null hypothesis to help GreenEnergy to identify which product offers consumers more satisfaction.

Product A Product B Participant Rating Participant Rating 1 3 1 9 2 4 2 7 3 2 3 5 4 6 4 10 5 2 5 6 6 5 6 8