One of the mysteries of the English language finally explained.
(of a test) testing for deviation from the null hypothesis in both directions.
- ‘Statistical tests were two-tailed and significance levels of alpha = 0.05 were used.’
- ‘In all the statistical analyses, two-tailed tests and a significance level of p [is less than or equal to].05 were used.’
- ‘All tests were two-tailed, and statistical significance was considered for p [is less than] 0.05.’
- ‘All statistical significance tests were two-tailed and performed at the 5% level.’
- ‘All tests are two-tailed, and statistical significance is considered at P < 0.05.’
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