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| alternative hypothesis ： ウィキペディア英語版 |
alternative hypothesis
(詳細はstatistical hypothesis testing,
the alternative hypothesis (or maintained hypothesis or research hypothesis) and the null hypothesis are the two rival hypotheses which are compared by a statistical hypothesis test.
In the domain of science two rival hypotheses can be compared by explanatory power and predictive power.
==Example==
An example might be where water quality in a stream has been observed over many years and a test is made of the null hypothesis that there is no change in quality between the first and second halves of the data against the alternative hypothesis that the quality is poorer in the second half of the record.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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