The procedure for the Wilcoxon rank sum test requires that we rank each group separately rather than ...

The procedure for the Wilcoxon rank sum test requires that we rank each group separately rather than together.
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Q. 2

A Wilcoxon rank sum test for comparing two independent samples involves two samples of sizes 6 and 10 . The alternative hypothesis is that the location of population 1 is different from the location of population 2 . Using a 0.05 significance level, the appropriate critical value is 32.
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Q. 3

The z-test approximation to the Wilcoxon rank sum test for two independent samples requires that both sample sizes are smaller than 10.
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Q. 4

The Wilcoxon rank-sum test is a nonparametric test that uses two independent simple random samples to determine whether the relative frequency distributions of two statistical populations of continuous values are identical to or different from one another.
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Q. 5

In a normal approximation to the Wilcoxon rank sum test, the standardized test statistic is calculated as z = 1.96 . For a two-tail test, the p-value of the test is 0.025.
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Q. 6

The Wilcoxon rank sum test is used to compare two populations when the samples are independent but not normally distributed.
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Q. 7

The statistical methods discussed in this chapter are used to test characteristics of populations without referring to specific parameters. For this reason, these techniques are called nonparametric techniques.
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