# significance test

Also found in: Dictionary, Medical, Wikipedia.
Related to significance test: significance level, T test

## significance test

(STATISTICS) a test designed to assess whether an observed (numerical) result can have occurred by chance. The result of the test is expressed as a statistic (e.g. t-ratio, F-ratio) which can be assessed against different levels of probability. It is usual to accept a level of probability of 0.05, i.e. that there is only a 5% probability of the result having occurred by chance.

Examples of significance tests are the t-test (parametric) and the Wilcoxon (non- parametric) (see STATISTICS AND STATISTICAL ANALYSIS). These tests are designed to test for the significance of the observed difference between two groups of data. For example, in social survey work two samples may be taken, racial attitudes in cities with and without ethnic minority problems, perhaps. There may be an apparent difference (numerical) between these groups, but the groups were samples and therefore the data is subject to SAMPLING ERROR. The difference between them must therefore be tested to see if there is a statistically significant difference between them. Significance tests are designed to set up a NULL HYPOTHESIS, stating ‘no difference’, and the test result either confirms or disconfirms this.

References in periodicals archive ?
Significance tests Die Hard: The amazing persistence of a probabilistic misconception.
The methodological contribution of current study is given in three stages: Incorporation of Pearson's chi-square and Yates's correction to the re-scaled data; Construction of the significance test for kurtosis coefficient associated with the first principal component and Evaluation of the Monte Carlo simulation test.
If these answers are satisfactory, then the risk manager can feel more comfortable with the significance test.
2])--explains x% of the variation of x in relation to y t Stat--the statistics of the coefficient significance test.
Basically, the habitats assessment starts with a tiered approach of a binary significance test on limited habitat conservation objectives and would, as it is initially dominated by a few preset planet criteria, easily ignore people or profit considerations.
This was subsequently followed by Kish, in 1959, with the article "Some Problems in Research Design," Rozeboom, in 1960, with the article "The Fallacy of the Null Hypothesis Significance Test," published in the Psychological Bulletin, or Carver, with the article "The Case against Statistical Significance Testing," published in 1978 in the journal Harvard Educational Review.
Our ultimate goal is to perform the significance test in evaluation and comparison using the standard errors computed.
According to the obtained results it is evident that variability is present based on a significance test in both groups; pandemic and classical H1H1 sequences.
Certainly our quantitative research is equally pre-occupied with statistical tests of significance, despite the fact that our discipline questioned such practices several decades ago (see Morrison and Henkel's The Significance Test Controversy, 1970).
70) significance test Number of [less than or 31 55 cigarettes/ equal to] 10 (60.
The main advantages of effect sizes are that unlike the statistical significance test the value is independent of the sample size, they are expressed in standardized units that facilitate comparison across studies, and they represent the magnitude of the differences, which is what is meaningful to researchers and their audiences.

Site: Follow: Share:
Open / Close