天气预报 > 其他 > 标准差取值小数点后应取几位
标准差取值小数点后应取几位
更新时间: 2020-10-03 00:00:00  

标准差取值,小数点后应取两位,即保留到百分位。标准差是离均差平方和平均后的方根,用σ表示。标准差是方差的算术平方根。标准差能反映一个数据集的离散程度。平均数相同的,标准差未必相同。

关键词: 标准 小数点

标准差取值小数点后应取几位相关经验

天气预报

最新推荐

页面:/news/view-650435/ | 耗时:0.5852 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=650435 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=650435 LIMIT 0,1
select * from tbl_Articles_sphinx where id=650435 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1115841,173513,649695,647882,730801,152011,353779,674110,365599,1132051,121297,380940,2626000,597697,1128957,707481,1096961,1132517,637354,687565,272343,313132,2263675,1097019,188419,1706467,337437,1121534,192792,346723) ORDER BY field (ArticleID,1115841,173513,649695,647882,730801,152011,353779,674110,365599,1132051,121297,380940,2626000,597697,1128957,707481,1096961,1132517,637354,687565,272343,313132,2263675,1097019,188419,1706467,337437,1121534,192792,346723)