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In the analysis of designed experiments, the Friedman test is the most common non-parametric test for complete block designs. The Durbin test is a nonparametric test for balanced incomplete designs that reduces to the Friedman test in the case of a complete block design. ==Background== In a randomized block design, ''k'' treatments are applied to ''b'' blocks. In a complete block design, every treatment is run for every block and the data are arranged as follows: For some experiments, it may not be realistic to run all treatments in all blocks, so one may need to run an incomplete block design. In this case, it is strongly recommended to run a balanced incomplete design. A balanced incomplete block design has the following properties: #Every block contains ''k'' experimental units. #Every treatment appears in ''r'' blocks. #Every treatment appears with every other treatment an equal number of times. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Durbin test」の詳細全文を読む スポンサード リンク
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