常用的样本统计量有( )。Ⅰ.样本方差Ⅱ.总体均值Ⅲ.样本均值Ⅳ.总体比例A、Ⅰ.Ⅱ.ⅢB、Ⅰ.ⅢC、Ⅰ.Ⅱ.ⅣD、Ⅱ.Ⅲ.Ⅳ

作者: rantiku 人气: - 评论: 0
问题 常用的样本统计量有( )。 Ⅰ.样本方差 Ⅱ.总体均值 Ⅲ.样本均值 Ⅳ.总体比例
选项 A、Ⅰ.Ⅱ.Ⅲ B、Ⅰ.Ⅲ C、Ⅰ.Ⅱ.Ⅳ D、Ⅱ.Ⅲ.Ⅳ
答案 B
解析 常用的样本统计量有样本均值、样本中位数、样本方差等等。
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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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