| 单词 | null hypothesis |
| 释义 | > as lemmasnull hypothesis null hypothesis n. Statistics a hypothesis that is the subject of a significance test, esp. the hypothesis that there is no actual difference between specified populations (any apparent difference being due to sampling or experimental error). ΘΚΠ the world > relative properties > number > probability or statistics > [noun] > significance > subject of null hypothesis1935 null1967 1935 R. A. Fisher Design Exper. ii. 19 We may speak of this hypothesis as the ‘null hypothesis’, and it should be noted that the null hypothesis is never proved or established, but is possibly disproved, in the course of experimentation. 1973 Jrnl. Genetic Psychol. 123 86 The specific null hypotheses tested were as follows: 1. There were no differences in hostile press (fear of failure) score decreases between self-reinforcement, group therapy, and control groups. 2. Hostile press scores do not decrease significantly during the self-reinforcement condition, [etc.]. 1990 Internat. Jrnl. Epidemiol. 19 1108/1 Here, test size is the probability that the null hypothesis will be rejected when there is in fact no association (OR = 1). < as lemmas |
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