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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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mitch44 mitch44
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A year ago
In the Wilcoxon rank-sum test, the null hypothesis may be expressed as:

​

\(\style{font-family:Times New Roman;}{H_0:\;{\overset˜\mu}_1-{\overset˜\mu}_2=\Delta_{\text{o}}}\)

​

If\(\style{font-family:Times New Roman;}{\Delta_{\text{o}}=0}\), then:



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the test is not valid.



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we can conclude that the null hypothesis is true and there is no difference in the two population medians only if the sample provides sufficient support for this assertion.



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there is insufficient evidence to reject the null hypothesis, but nothing is said about the validity of the null hypothesis.



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the median of population 1 is equal to the mean of population 2, provided both populations are heavily skewed.

Textbook 
Introductory Statistics: A Problem-Solving Approach

Introductory Statistics: A Problem-Solving Approach


Edition: 3rd
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PmochPmoch
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