American attitudes toward big business change over time and probably are cyclical. Suppose the following data represent a survey of 20 American adults taken in 1990 and again in 2013 in which each adult was asked to rate American big business overall on a scale from 1 to 100 in terms of positive opinion. A response of 1 indicates a low opinion and a response of 100 indicates a high opinion. Use a Wilcoxon matched-pairs signed rank test to determine whether the scores from 2013 are significantly higher than the scores from 1990.Use α = .10.Assume the underlying distributions aresymmetrical.

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Person 1990 2013 49 27 39 75 59 67 54 38 38 80 53 68 43 67 73 61 58 60 72 62 49 48 19 32 60 80 10 12 13 14 15 16 17 18 19 20 58 57 63 49 39 34 90 57 58 68