A market analyst stopped people in the local shop ping mall and asked them to rate two kinds of shampoo on a scale of 1–4, 1 being the lowest. The ratings of the two different brands of shampoo are listed here. Do a test to determine whether brand B is better than brand A. Use 5 percent.

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Brand A 1 1 2 2 4332 B 4 2 2 1 2 2 2 2 Brand A 2272NNNN1 B 4 ++ 4 233444 3 4 Brand A 2224 2 2 3 B 3 N12 2 432 3 2 Brand A 3 212 WW NW 2 3 3 B 4 4 4 4 324