统计学计算题,急急...........!!!!!!!!!!!!!
统计学计算题,急急...........!!!!!!!!!!!!!
日期:2007-07-03 15:56:20 人气:1
后三题都很简单,第一题我吃不准
明天做给你~
4:P=220/2000=0.11
抽样极限误差为=P(1-P)/n的值开根号
=0.11*0.89/220
=0.02
则区间为(0.11-0.02*1.96,0.11+0.02*1.96)
=(0.0708,0.1492)