Show that E(X - k)2 = var (X) + [E(X) - k]2. For what value of k

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Show that E(X - k)2 = var (X) + [E(X) - k]2. For what value of k will E(X - k)2 be minimum? And what is that value of k?
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Essentials of Econometrics

ISBN: 978-0073375847

4th edition

Authors: Damodar Gujarati, Dawn Porter

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