Examlex
Living organisms are categorized into two major groups based on the presence or absence of a nucleus.What group is defined by the presence of a nucleus?
Aluminum Concentrations
The measured levels of aluminum in a given sample or environment.
Test Statistic
A statistic used to estimate the parameter of interest in a statistical hypothesis test.
Kruskal-Wallis Test
A nonparametric statistical test used to compare three or more groups based on ranked data. It is an extension of the Mann-Whitney U test for more than two groups.
Null Hypothesis
The hypothesis in statistical analysis that proposes there is no significant difference or relationship between specified populations, any observed difference being due to sampling or experimental error.
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