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Assume a researcher compared the performance of a group of 10 people at two different time points using the Wilcoxon signed-rank tests.
a. Using a p level of 0.05 and a two-tailed test, what is the critical value?
b. If T = 10, would the researcher reject or fail to reject the null hypothesis? Explain.
c. If T = 6, would the researcher reject or fail to reject the null hypothesis? Explain.
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Given the sample results shown below, use the 0.05 level of significance in determining whether the new filtration system could be superior.
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