What is r to p value - Definition and Meaning

R To P Value :

'r', its value varies between -1 and 1, 1 means perfect correlation, 0 means no correlation, positive values means the relationship is positive, negative values mean the relationship is negative. Also called correlation coefficient.


Formula :

t = r/sqrt[(1—r2)/(N—2)]
df = N-2
P (one and two tailed) = [ 1/ ( (√df) Β(1/2,df/2) ) ] lt->-t to t ∫ ( 1+ x²/df)(-(v+1)/2) .dx

Example :

Sample size = 12 Observed value = 0.8 t = 4.216 df = 10 one tailed = 0.000891 two tailed = 0.001782

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