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When I calculate confidence intervals for a point estimate in NHANES, should I use the t score or the Z score in the formula?

April 26, 2017CALCULATE confidence estimate Formula intervals nhanes point score

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When I calculate confidence intervals for a point estimate in NHANES, should I use the t score or the Z score in the formula?

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You should use a t-statistic with degrees of freedom equal to the difference between the number of PSUs and the number of strata containing observations.