Pythagorean expectation portrays what a team's winning percentage "should" be given it's runs scored and allowed.
pyth(rs, ra, alpha = 2)
Exponent to use
2 and 1.83 are the most common exponents used. 1.83 is the exponent baseball-reference uses in its calculations.
Returns a value equal to (rs^alpha)/(rs^alpha + ra^alpha)
Pythagorean expectation can be used in a multitude of sports like basketball and football
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