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Wilcoxon test

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Wilcoxon test
a test used in statistics to compare paired data. Has the advantage of incorporating the size of the difference between the two sets of data in the comparison.


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The Wilcoxon test statistic is the sum of the ranks in the second sample: W = [n.
Because of our concern that the data is not normally distributed, non-parametric Wilcoxon tests were used to compare the folic acid and placebo groups at baseline, at 6 weeks and to compare the 6 week changes between the folic acid and placebo groups.
For statistical analysis, we used the nonparametric Wilcoxon test for dependent data because the distribution of data was not normal.
 
 
 
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