解:(1)设样本容量为 ,则
,所以 . 即样本容量为15.·················································································· 1分
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108070011-60613.jpg) (2)样本的众数为4万元;······································································ 3分 中位数为6万元;··················································································· 4分 平均数为 (万元).·········································· 5分 (3)如果想让一半左右的员工都能达到目标,个人年利润可以定为6万元.因为从样本情况看,个人年利润在6万元以上的有7人,占总数的一半左右.可以估计,如果个人年利润定为6万元,将有一半左右的员工获得奖励.································································································· 7分 (说明:答对“6万元”得1分,理由大致相同,得1分) 如果想确定一个较高的目标,个人年利润可以定为7.4万元.因为在样本的众数,中位数和平均数中,平均数最大.可以估计,如果个人年利润定为7.4万元,大约会有 的员工获得奖励.························ 9分 (说明:答对“7.4万元”得1分,理由大致相同,得1分) |