问题详情

答案解析

<br />1.n=100时,样本比例的标准差为<br /><img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/89477645-1245-4acb-a616-23d42a0f82ba.jpg" width="284" height="47" /><br />同理,可以计算出n=200,500,1000时的样本比例的标准差分别为0.035,0.022,0.016。<br />2.当样本量增大时,样本比例的标准差越来越小。