例如一个人寿保险公司也许不能预测每个人的寿命长度，但它可以对群体做出准确预测。
A life-insurance company, for instance, could wrongly predict the life span of every person it insured but still get the correct result for the group.
例如一个人寿保险公司也许不能预测每个人的寿命长度，但它可以对群体做出准确预测。
A life-insurance company, for instance, could wrongly predict the life span of every person it insured but still get the correct result for the group.
应用推荐