Week 7 - Assignment: Conduct a Comparative Analysis of Non-Parametric Statistics in Extant Literature

SAGE Research Methods Video

Wilcoxon Test

Video Title: Wilcoxon Test

Originally Published: 2016

Publication Date: Sep. 30, 2016

Publishing Company: SAGE Publications, Inc.

City: Thousand Oaks, United States

ISBN: 9781506359199

DOI: https://dx.doi.org/10.4135/9781506359199

(c) SAGE Publications Inc., 2017

HERSCHEL KNAPP: Welcome to Practical Statistics for Nursing using SPSS. This video shows how to process the Wilcoxon test. You can watch the entire video, or use the time slider to navigate directly to any time point.

HERSCHEL KNAPP [continued]: The Wilcoxon Test is quite similar to the paired t-test. Before proceeding, it's recommended that you first view the video ch 09 Paired t-test. mp4 In terms of setup and results, the Wilcoxon Test

HERSCHEL KNAPP [continued]: and the paired t-test are quite similar. In a practical sense, the only difference between these two tests is that the paired t-test is used when the pretest criteria of normality of differences is satisfied. Otherwise, the Wilcoxon test is a better choice. For example, if the histogram renders

HERSCHEL KNAPP [continued]: an atypical distribution, such as skewed, bimodal or flat, the Wilcoxon test is a more suitable choice for assessing pretest post-test scores. This example uses the data set ch 09 example 01 paired t-test.

HERSCHEL KNAPP [continued]: sav To run the Wilcoxon test, click on Analyze, non-parametric tests, legacy dialogs, two related samples. Move pretest into variable 1, and post-test into variable 2.

HERSCHEL KNAPP [continued]: Click OK. And it will process. [WILCOXON TEST RESULTS] The test statistics table shows a p value of 0.12 Since this is less than 0.5, this suggests that there is a statistically significant difference between the pre-test and the post-test scores.

HERSCHEL KNAPP [continued]: This concludes this video.

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SAGE Research Methods Video

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