A.选择偏倚B.回忆偏倚C.测量偏倚D.失访偏倚E.随意误差在选择研究对象时方法不正确产生的偏倚,称为

作者: rantiku 人气: - 评论: 0
问题 A.选择偏倚 B.回忆偏倚 C.测量偏倚 D.失访偏倚 E.随意误差 在选择研究对象时方法不正确产生的偏倚,称为
选项
答案 D
解析 正确答案:20.D,21.C,22.B

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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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