Which one of the following statements is incorrect? O 1. 02 The probability density function (pdf) of X is fx(x) == F(x). For a Bernouilli random variable X, Var(X) = p(1 - p). 03. The statistic T is called an unbiased estimator for the parameter 0 if E(T) = 0. 04 Let X, and X₂ have a bivariate normal distribution. Then X₁ and X₂ are independent if and only if they are uncorrelated.

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