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Formulas/Equations for Statistics 1
Is between -1 (strong negative) and 1 (strong positive)
(SXX)(SY Y )
SXX = xi2 - 1 2
SYY = yi2 - 1 2
SXY = xiyi - 1
n xi yi
Expectation = xipi
Variance = x2 - [(x)]2
Standard Deviation = 1 2
n xi - x
Permutations and Combinations
Number of ways of arranging objects = n!
Number of ways of arranging objects when more than one is alike = p!q !r!
Number of permutations for an ordered arrangement of r objects from n unlike objects = n!
Number of combinations of r objects from n unlike objects = n!