created sense approved 平方平均数/平方平均數 · píngfāngpíngjūnshù · root mean square
平方平均数 / 平方平均數
píngfāngpíngjūnshù
root mean square
The square root of the arithmetic mean of the squares of a set of values, also known as the quadratic mean.
在统计学中，平方平均数常用于衡量数据的波动程度。