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The Wilcoxon Rank-Sum Test for Independent Samples

Study Force 14,395 5 years ago
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✔ https://StudyForce.com ✔ https://Biology-Forums.com ✔ Ask questions here: https://Biology-Forums.com/index.php?board=33.0 Follow us: ▶ Facebook: https://facebook.com/StudyForcePS/ ▶ Instagram: https://instagram.com/biologyforums/ ▶ Twitter: https://twitter.com/studyforceps Q. Suppose we wish to compare two competing treatments for the management of adult-onset diabetes. A total of eight subjects agree to participate in the investigation and are randomly assigned to one of the competing treatments. After following the prescribed treatment regimen for 6 weeks, we assess the patients’ self-reported health status. Patients are asked to rate their current health on an ordinal scale from 0 to 20, with higher scores reflecting better health. Are self-reported health status scores different between treatment groups? Note: The groups are independent, the sample size is small, and it is not stated to be normally distributed, so we use a non-parametric test. As with other non-parametric test, the hypothesis is based on the equality of the medians (μ ̃).

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