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收集数据后,你要做的第一件事往往就是对它进行分析。这通常都免不了要计算均值、标准差和标准误差。本文将向你展示如何计算。
步骤
小提示
- 均值、标准差和标准误差的计算对于分析正态分布的数据最有用。距离中心位置1个标准差的范围覆盖了约68%的数据,距离其2个标准差的范围覆盖了95%的数据,而3个标准差能覆盖99.7%的数据。随着样本大小的增加,标准误差会变小(分布范围变窄)。
- 易用在线标准差计算器
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警告
- 仔细检查计算。计算中很容易出现失误,或是输入错误的数据。
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