以下抽样方法属于概率抽样的是A.分层抽样B.方便抽样C.配额抽样D.目的抽样E.滚雪球抽样

作者: rantiku 人气: - 评论: 0
问题 以下抽样方法属于概率抽样的是
选项 A.分层抽样 B.方便抽样 C.配额抽样 D.目的抽样 E.滚雪球抽样
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
    <?php echo 'KongPHP, Road to Jane.'; ?>