某工厂生产电子芯片，质检部门对同一批产品进行随机抽样检测，检测结果统计如表：由此估计这批产品合格的概率为 ．（精确到0.01）                                                                                                                                                                                

抽查数n	1000	2000	3000	4000	5000
合格品数m	957	1926	2868	3844	4810
合格品频率	0.957	0.963	0.956	0.961	0.962