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The Tendex system is a basketball mathematical statistical formula that was created by sports writer Dave Heeren,[1] in order to determine the playing efficiency of basketball players.[2][3][4] It is generally accepted as the original weighted advanced stat formula used in the sport of basketball.[5]


The Tendex statistical system has 3 different formulas and is calculated as follows:[6][7]

Standard Tendex Rating: (Tendex raw statistical formula)

Modified Tendex Rating: (Tendex weighted average statistical formula)

European Tendex Rating (Performance Index Rating (PIR)): (EuroLeague / EuroCup)

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