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A test used to determine the statistical significance of an observation. Two main types of error can occur: 1. A type I error occurs when a false negative result is obtained ...

The probability of getting a positive result for a given test which should produce a positive result.

A statistical test making use of the statistical ranks of data points. Examples include the Kolmogorov-Smirnov test and Wilcoxon signed rank test.

A nonparametric alternative to the two-sample t-test.

A statistical test in which assumptions are made about the underlying distribution of observed data.

A generalization of the Wilcoxon rank sum test.

A test for determining the probability that a given result could not have occurred by chance (its significance).

The Wilcoxon test statistic is equivalent to the T_+ statistic in the Wilcoxon signed rank test (Kanji 1999).

The Mann-Whitney test statistic is equivalent to the Wilcoxon test statistic (van der Waerden 1969).

A robust nonparametric test which is an alternative to the paired t-test. This test makes the basic assumption that there is information only in the signs of the differences ...