y - JMP
y - JMP
y - JMP
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散 点 图 与 相 关 系 数 的 概 念<br />
Y (output)<br />
STRONG<br />
Negative<br />
weak<br />
STRONG<br />
Positive<br />
-1 0<br />
1<br />
Correlation Coefficient<br />
X (input)<br />
r<br />
=<br />
∑<br />
∑<br />
(<br />
x<br />
(<br />
x<br />
i<br />
−<br />
i<br />
−<br />
x<br />
)<br />
x<br />
)(<br />
2<br />
⋅<br />
y<br />
∑<br />
i<br />
−<br />
y<br />
)<br />
(<br />
y<br />
i<br />
−<br />
y<br />
)<br />
2<br />
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