There are many factors that influence the sampling error, such as, extent of mark variation, amount of sample unit and the choice of sampling method, etc.
影响抽样误差大小有很多因素，如标志变异程度，样本单位数量的多少，抽样方式方法的选择等。
2
Veteran entertainment lawyer Mark Litwak has recently updated his indispensable legal guidebook featuring checklists, sample contracts, and advice on avoiding legal traps.
老牌娱乐业律师马克利特域最近更新其不可缺少的具有法律指南清单，合同样本，并避免法律陷阱意见。
3
Expound on the fact example: the interrelated degree of two marks of yes or on, sample estimate in the condition of two mark of yes or no.