maxOS Braindump
Arithmetic Mean
Definition
是一组数据之和，除以这组数据个数/项数。
Denoted
\
{\bar {x}} \
Formula
x
¯
=
∑
i
=
1
n
x
i
n
=
x
1
+
x
2
+
⋯
+
x
n
n
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Mean
