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+package limpet.prototype.ian_generics;%0A%0Aimport javax.measure.Quantity;%0A%0Apublic interface IQuantityCollection%3CQ extends Quantity%3C?%3E%3E%0A%7B%0A%09public Q min();%0A%09public Q max();%0A%09public Q mean();%0A%09public Q sd();%0A%7D%0A

introduce set of quantitative statistics