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Using the Wilcoxon Signed-Ranks Test. Paired sample data and use the Wilcoxon signed-ranks test to test the claim that the matched pairs have differences that come from a population with a median equal to zero. Weather Forecasts? Listed below are actual high temperatures and the high temperatures forecast one day in advance. Use a 0.05 significance level to test the claim that the population of differences has a median of zero. What do the results suggest about the accuracy of the predictions?

Actual high temperature 80 77 81 85 73 73 80 72

High temperature forecast one day before 78 75 81 85 76 75 79 74

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Statistics and Probability, Statistics

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