用频率来反映事件出现可能性的大小存在局限性,也可以说是有片面性的,因为对于同一个事件A,如果重复试验的次数n不同,所得的频率R(A)也不同,试验次数愈少,它的随机性就愈大。例如,取成型的一根钢筋来检查,可能是合格品,也可能是不合格品,那就是说,出现不合格品的频率要么是 The use of frequency to reflect the probability of the occurrence of an event has limitations, and it can also be said to be one-sided, because if the number of repeated trials n is different for the same event A, the resulting frequency R(A) will also be different and the number of trials will be different. Less, the greater its randomness. For example, if a steel bar is taken for inspection, it may be a quality product or a non-conforming product. That is, the frequency of non-conforming products is either