Suppose 16 people in various industries are contacted in 2018 and asked to rate business conditions on several factors. The ratings of each person are tallied into a “business optimism” score. The same people are contacted in 2019 and asked to do the same thing. The higher the score, the more optimistic the person is. Shown here are the 2018 and 2019 scores for the 16 people. Use a Wilcoxon matched-pairs signed rank test to determine whether people were less optimistic in 2019 than in 2018. Assume the underlying distributions are symmetrical and that alpha is .05.

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Industry April 2018 April 2019 1 2 3 456789 10 11 12 13 14 15 16 63.1 67.1 65.5 68.0 66.6 65.7 69.2 67.0 65.2 60.7 63.4 59.2 62.9 69.4 67.3 66.8 57-4 66.4 61.8 65.3 63-5 66.4 64.9 65.2 65.1 62.2 60.3 57-4 58.2 65.3 67.2 64.1