某年某县20名15岁男孩身高均数与同年该市人口普查得到的15岁男孩身高均数之差的检验为(  )A.样本均数与总体均数的t检验B.u检验C.成组...

作者: rantiku 人气: - 评论: 0
问题 某年某县20名15岁男孩身高均数与同年该市人口普查得到的15岁男孩身高均数之差的检验为(  ) A.样本均数与总体均数的t检验 B.u检验 C.成组t检验 D.配对t检验 E.以上都不是
选项
答案 A
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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