"Significance level" nghĩa là gì?

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"Significance level" hoặc "level of significance" nghĩa là mức ý nghĩa thống kê, thường được thể hiện dưới dạng giá trị p (p-value).

Ví dụ
Two years plus interim (tạm thời) periods were required at significance levels between 40% and 50%, with one year and interim periods required at significance levels over 20%.

Sample size (quy mô mẫu) for these trials would depend on the choice of noninferiority (không thấp kém hơn) margin, significance level, power, and the underlying variability in the trial (thử nghiệm) end point.

Reasonable expectations are that the statistical significance of phase II will be confirmed in phase III and that trials that record a significance level under the threshold (ngưỡng cửa) in phase II will be suspended (tạm ngưng).

Perhaps counterintuitively (trái ngược), the lower the statistical (thống kê) power, the lower the probability that an observed effect which reaches an arbitrary statistical significance level (such as p < 0.05) actually reflects a true effect, making the discovery of false positives more likely.


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