Simplify: 
Definitions:
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.
Null Hypothesis
A statement or idea that suggests there is no statistical significance or effect between certain observed phenomena or variables.
Wilcoxon Rank Sum Test
A nonparametric statistical test that compares two independent samples to assess whether their populations have the same distribution.
Height Centimeters
A measurement of how tall a person or object is, specified in centimeters.
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