假设检验是用于检验统计假设的一种方法，其基本思想是“小概率事件”原理，即小概率事件在一次试验中基本上不会发生。 假设检验的基本方法是提出一个空假设（null hypothesis），也叫做原假设或无效假设，符号是H0。一次检验有四种可能的结果，用下面的 ...

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Clinical trials rely on statistics to show whether drugs are more effective than placebo pills. But how can we be certain? Semmick Photo/Shutterstock How should scientists interpret their data?

How many statisticians does it take to ensure at least a 50 percent chance of a disagreement about p-values? According to a tongue-in-cheek assessment by statistician George Cobb of Mount Holyoke ...