Use the Wilcoxon matched-pairs signed rank test to determine whether there is a significant difference between the related populations represented by the data below. Assume a 5% level of significance and (differences = before - after). Before    After 5.6        6.4 1.3        1.5 4.7        4.6 3.8        4.3 2.4        2.1 5.5        6.0 5.1        5.2 4.6        4.5 3.7        4.5 What is the value of T-? What is the value of T+? What is the test statistic, T? Using the table of Critical Values, what is the critical value for this study?

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