Suppose That 6 Economists Who Work for the Federal Government

question 18

Multiple Choice

Suppose that 6 economists who work for the federal government and 7 university economists were asked to predict the percentage change in the Canada's GDP over the three year period from January 2010 to January 2013. The Wilcoxon rank-sum test was used to determine if the two groups differ in their predictions. The value of the test statistic was calculated to be 29.5. At α = 0.05, we can conclude that

• A) The null hypothesis should be rejected.
• B) The null hypothesis should not be rejected.
• C) There is a difference in predictions provided by the two groups of economists.
• D) The null hypothesis should be rejected and that there is a difference in predictions provided by the two groups of economists.
• E) The null hypothesis should not be rejected and that there is not a difference in predictions provided by the two groups of economists

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