Examlex
What is an abnormal enlargement of the prostate gland surrounding the urethra, leading to difficulty with urination?
Wilcoxon Rank Sum Test
The Wilcoxon Rank Sum Test is a nonparametric statistical test used to compare two independent samples, assessing whether their populations have the same distribution.
Chi-Squared Distribution
A statistical distribution used in hypothesis testing that is the distribution of a sum of the squares of k independent standard normal random variables.
9-point Scale
A scale often used in surveys and research to rate or assess opinions, attitudes, or behaviors, where 1 typically indicates the lowest extent and 9 the highest.
Significance Level
The probability of erroneously rejecting the true null hypothesis in statistical testing, often denoted by alpha.
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