15 (26997) – ( 480) (839)
r = ------------------------------------------------------
√[15(15586) – (480)2] [15(47721) – (839)2]
formula:
n ∑xy – (∑x) (∑y)
r = -------------------------------
∑x2 – (∑x)2] [n∑y2 – (∑y)2]
example solution:
15 (3629) – (218) (222)
r = ------------------------------------------------------
√[15(3646) – (218)2] [15(3606) – (222)2]
54435 - 48396
r = ------------------------------------------------------
√[54690-47524] [54090-49284]
6039
r = --------------------------------
√(7166)(4806)
6039
r = -------------------------
√34439796
r = 1.029 or 1.03
pls help me.
