分层抽样的优点是()。A:操作简单,均数、率及相应的标准误计算简单B:样本代表性好、抽样误差减少C:便于组织、节省经费D:易于理解、简便易行

作者: rantiku 人气: - 评论: 0
问题 分层抽样的优点是()。
选项 A:操作简单,均数、率及相应的标准误计算简单 B:样本代表性好、抽样误差减少 C:便于组织、节省经费 D:易于理解、简便易行
答案 B
解析

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