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Suppose that a signal s that takes on values 1 and -1, with probability p and...

Suppose that a signal s that takes on values 1 and -1, with probability p and 1-p respectively, is sent from location A. The signal received at location B is Normally distributed with parameters (s, 2). Find the best estimate of the signal sent, in the Mean Absolute Error sense, if R, the value received at location B, is equal to r.

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