各观察值均加(或减)同一数后A、均数不变,标准差改变B、均数改变,标准差不变C、两者均不变D、两者均改变E、以上均不对

作者: rantiku 人气: - 评论: 0
问题 各观察值均加(或减)同一数后
选项 A、均数不变,标准差改变 B、均数改变,标准差不变 C、两者均不变 D、两者均改变 E、以上均不对
答案 B
解析 正确答案: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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