Phillips W C, Scott J A, Blasczcynski G
AJR Am J Roentgenol. 1983 Jul;141(1):203-6. doi: 10.2214/ajr.141.1.203.
Statistical tests are often used to compare two or more groups. When the tests show "no significant difference," many authors/readers conclude that this means that the groups are identical. Often this outcome is merely the result of inadequate sample size. The adequacy of sample size depends on well established mathematical principles, not on the investigator's intuition. The real meaning of "no significant difference" is discussed.
统计检验常用于比较两个或多个组。当检验显示“无显著差异”时，许多作者/读者会得出这意味着这些组是相同的结论。通常这种结果仅仅是样本量不足的结果。样本量是否充足取决于已确立的数学原理，而非研究者的直觉。本文讨论了“无显著差异”的真正含义。
