Correlation Coefficient Formula
r
n
Blanched formula
n
Œ
XY
n
Ð
(
X
)(
Y
)
n
r
=
N
n
(SD
X
)(SD
Y
)
n
Raw score formula
n
N
Œ
XY Ð (
Œ
X)(
Œ
Y)
n
r
=
n
…
(N
Œ
X
2
Ð (
Œ
X
)
2
(N
Œ
Y
2
Ð (
Œ
Y
)
2
