Examlex
What are the two types of nonprobability samples?
Wilcoxon Rank Sum Test
A non-parametric statistical test used to compare two independent samples to determine if they come from the same distribution.
Null Hypothesis
A default hypothesis that there is no significant difference or effect, often represented as H0 in statistical tests, to be tested against an alternative hypothesis.
Wilcoxon Test
A non-parametric statistical test used to compare two paired groups and determine whether their population mean ranks differ.
Expected Value
A measure in probability and statistics indicating the average outcome of a random event, calculated as the weighted average of all possible values.
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