F-ratio/ Fischer's Ratio:
F= mean sq. of b/w sample/ mean sq. of w/i sample

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@pychometer
F-ratio/ Fischer's Ratio:
F= mean sq. of b/w sample/ mean sq. of w/i sample
Relationship among mean, mode and median:
Mode = 3 Median - 2 Mean
Coefficient of variance = S.D/Mean × 100
Z- score = (score - mean)/standard deviation
Gustav Fechner--> Weber's law
Ernst Weber--> just noticable difference (jnd)
If you test a monkey, a leopard and a crocodile on their agility based on the ability to climb a tree......
Your test will be reliable but will clearly lack validity!