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    Stats Explained

    by Ken Pomeroy on Monday, August 1, 2005


    Let’s start with the most basic stats to measure the ability of a team’s offense and defense.

    Offensive efficiency

    Points scored per 100 offensive possessions.

    Defensive efficiency

    Points allowed per 100 defensive possessions.

    In order to compute efficiency, we need to know how to compute possessions.

    Possessions

    We can estimate possessions very well from box score stats by using this formula.

    FGA-OR+TO+0.475xFTA

    For each team, possessions are counted for the team and their opponents, and then averaged.

    Efficiency gives us broad view of how well the offense or defense functions, but we can break efficiency into what Dean Oliver dubbed the Four Factors. Shooting, rebounding, turnovers, and free throws provide the basic components of efficiency.

    Effective field goal percentage (eFG%)

    (FGM + 0.5*3PM) / FGA

    Shooting is measured by effective field goal percentage, which differs from conventional field goal percentage by taking into account the extra value of a made…

    Read more...