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F-ratio/ Fischer's Ratio:

F= mean sq. of b/w sample/ mean sq. of w/i sample

#research methodology #statistics #psychology #studyblr #psychblr #study notes #entrance prep

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Relationship among mean, mode and median:

Mode = 3 Median - 2 Mean

#research methodology #statistics #studyblr #psychblr #psychology #study notes #entrance prep

Coefficient of variance = S.D/Mean × 100

Z- score = (score - mean)/standard deviation

#research methodology #tests and measurements #z-score

Gustav Fechner--> Weber's law

Ernst Weber--> just noticable difference (jnd)

#perception #psychophysics

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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!

#psychblr #psychology #reliability #validity #test and measurements #psytrance

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