在抽样调查中,下列哪种抽样方法的抽样误差最小A、整群抽样B、先分层再抽样C、系统抽样D、分层抽样E、单纯随机抽样

作者: rantiku 人气: - 评论: 0
问题 在抽样调查中,下列哪种抽样方法的抽样误差最小
选项 A、整群抽样 B、先分层再抽样 C、系统抽样 D、分层抽样 E、单纯随机抽样
答案 D
解析

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  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
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