Exam 16: Nonparametric Methods: Analysis of Ordinal Data

Fifty-five voters from a sample of 80 indicated that they favored casino gambling in their city. The city council is interested in finding out whether there is a significant difference between the proportions of those favoring and not favoring casino gambling in their community. The test statistic is ________.

Twenty economists were sampled and asked to predict if the national economy would improve during the next 12 months. Eleven of the economists predicted an increase,two economists predicted no change,and seven economists predicted a decrease in the economy. Conduct a hypothesis test at the 0.10 significance level to determine if the majority of economists predicts an increase. Based on the analysis,we would conclude that ________.

The Wilcoxon rank-sum test computes a z-test statistic.

Using the following data,the Wilcoxon signed-rank hypothesis test is used to test the hypothesis that there is no difference between the Before and After populations. What are the sum of the ranks?