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Which of the following statements about sampling and estimation is most accurate? A. The probability that a parameter lies within a range of estimated values is given by α. B. The standard error of the sample means when the standard deviation of the population is known equals σ / √n, where σ = sample standard deviation adjusted by n − 1. C. The standard error of the sample means when the standard deviation of the population is unknown equals s / √n, where s = sample standard deviation. |