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 2009 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 2009 are significantly higher than the scores from 1990.

Use α = .10. Assume the underlying distributions aresymmetrical.

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200 54 38 38 80 53 68 43 67 73 55 58 57 63 49 39 34 66 90 57 58 0-533856 4 6 7 5 5 5 6 4 3 3 6 9 55 97959721802298920058 9, 4 2 3 7 5 6 2 6 5 6 7 6 4 4 1 3 6 856 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0