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We use a 1 distribution with n - 1 degrees of freedom. In determining an interval estimate of a population mean when o is unknown,
We use a 1 distribution with n - 1 degrees of freedom. In determining an interval estimate of a population mean when o is unknown, In determining an interval estimate of a population mean when o is known, In determining an interval estimate of a population standard deviation when o is unknown, In determining an interval estimate of a population standard deviation when o is known
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