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need to verify this question so please answer and will up veto Exercise 1.4 Suppose two different samples of the same size, n, are taken

need to verify this question so please answer and will up veto

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Exercise 1.4 Suppose two different samples of the same size, n, are taken from a population. Let us call them samples A and B. Case 1: If o is known, then the confidence interval for the mean using samples A and B would have: O the same center. O the same width. the same center and width. O None of the above. Case 2: If o is unknown, then the confidence interval for the mean using samples A and B would have: O the same center. the same width. O the same center and width. None of the above. Case 3: The confidence interval for the proportion using samples A and B would have: O the same center. the same width. the same center and width. O None of the above

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