Step 1: Find all the initial values

The total number of values (n) is 3.

[quads id=1]

The other values we need are:

ΣA =3 + 4 + 1 = 8

ΣB = 1 + 6 + 2 = 9

ΣAB = 3 + 24 + 2 = 29

ΣC = 9 + 16 + 1 = 26

ΣD= 1 + 36 + 4 = 41

Step 2: Input the Values

(r) =[ nΣAB – (ΣA)(ΣB) / Sqrt([nΣC– (ΣA)²]  [nΣD – (ΣB)²])]

r = [3(29) – (8)(9) / Sqrt ([3(26) – (8) ² ]  [3(41)-(9) ²  ])]

r= [87-72 / Sqrt ([78-64]  [123 -81])]

r= [15 / Sqrt ([14] [42])]

r=[15 / Sqrt (588)]

r= 15 / 24.24

r= 0.61

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