Two types of razor blades are being compared. One is called Trim-Shaves and the other is called Smooth-Shaves. They are being compared on the bases of the number of shaves before becoming dull. Eight people are selected and given Trim-Shave blades. Eight more people are selected and given Smooth-Shave blades. The results were as follows:
Calculate the required non-parmetric test statistic to test the hypothesis that the two sampled populations have identical distributions versus the distribution for Trim-Shave blades is shifted to the left or right of that for Smooth-Shave blades. Give your answer to two decimal places, if needed.
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