一组数据3，x，0，-1，-3的平均数是1，则这组数据的极差为_______

一组数据3，x，0，-1，-3的平均数是1，则这组数据的极差为________．

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问题一组数据3，x，0，-1，-3的平均数是1，则这组数据的极差为________．

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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.'; ?>

一组数据3，x，0，-1，-3的平均数是1，则这组数据的极差为________．

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