Which of the following statements is correct regarding a biased statistic?   Group of answer choices A.) A biased statistic occurs when the average value of a statistic overestimates the corresponding population parameter. B.) A biased statistic occurs when the average value of a statistic underestimates the corresponding population parameter. C.) A biased statistic occurs when the average value of a statistic is equal to the corresponding population parameter. D.) A biased statistic occurs when the average value of a statistic either underestimates or overestimates the corresponding population parameter

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