| 词汇 | null-hypothesis |
| 释义 | null hypothesis noun[ S ] ukus a theory that states that two groups that are being tested will be expected to show the same results until this is proved not to be true Examples of null hypothesisnull hypothesis The alternative hypothesis, as the name suggests, is the alternative to the nullhypothesis: it states that there "is" some kind of relation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A nullhypothesis is the general or default statement that nothing happened or changed. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. That is, it is used in time series analysis to test the nullhypothesis that a time series is integrated of order 1. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The statement that is hoped or expected to be true instead of the nullhypothesis is the alternative hypothesis. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The nullhypothesis assumes no relationship between variables in the population from which the sample is selected. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This class of data-sets is usually specified via a test statistic which is designed to measure the extent of apparent departure from the nullhypothesis. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A familiarity with the range of tests available may suggest a particular nullhypothesis and test. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The concept of a nullhypothesis is used differently in two approaches to statistical inference. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Unless a test with particularly high power is used, the idea of accepting the nullhypothesis may be dangerous. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The nullhypothesis is that two variances are the same so the proposed grouping is not meaningful. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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