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確認テスト 基礎編2.2 (易) 期待値の定義

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方針

2.4で確認した通り,前者を最小にするtは期待値で,後者を最小にするtは中央値である.よって期待値,中央値を求める問題と置き換えることもできるし,2.4と同様に最小化問題として前者は平方完成,後者は微分して一階条件を求める形でも良い.

答案

確認テスト 基礎編2-2.jpg
確認テスト 基礎編2-3.jpg

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