What does a simple hypothesis mean


Alternative hypothesis


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The Alternative hypothesis (English: alternative hypothesis) denotes the opposite of the "null hypothesis" of a "hypothesis test". The alternative hypothesis usually describes the assumption that is actually of interest, the so-called Working hypothesis. For the practical implementation of a hypothesis test, however, it is of secondary importance. It only serves to localize the area of ​​the "test variable" in which the null hypothesis is rejected, the so-called Rejection area. One distinguishes simple and compound Hypotheses, depending on whether one has a concrete value (Point hypothesis) or a range of values ​​(Range hypothesis) specified as an alternative hypothesis. An area hypothesis can be formulated either unilaterally or bilaterally, depending on whether the area of ​​rejection is located on one or both sides of the null hypothesis. The size of the rejection area depends on the selected »significance level«.

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Next page:Level of significance (probability of error) Upwards:Test procedure Previous page:Null hypothesis & nbsp index HJA 2001-10-01