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A confidence interval for mu when sigma is unknown (using t) is wider than a confidence interval for mu when sigma is known (using Z).

A confidence interval for mu when sigma is unknown (using t) is wider than a confidence interval for mu when sigma is known (using Z). Group of answer choices True False A confidence interval for mu when sigma is unknown (using t) is wider than a confidence interval for mu when sigma is known (using Z). Group of answer choices True False

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