45 CFR — Public Welfare
Appendix C to Part 1356—Calculating Sample Size for NYTD Follow-Up Populations
United States · 45 CFR — Public Welfare · Status: effective
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- 45 CFR — Public Welfare, Appendix C to Part 1356—Calculating Sample Size for NYTD Follow-Up Populations, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/221402
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Full text
The Finite Population Correction (FPC) is applied when the sample is drawn from a population of one to 5,000 youth, because the sample is more than five percent of the population.
• (Py)(Pn), an estimate of the percent of responses to a dichotomous variable, is (.50)(.50) for the most conservative estimate.
• Acceptable level of error = .05 (results are plus or minus five percentage points from the actual score)
• Z = 1.645 (90 percent confidence interval)
• N = number of youth from whom the sample is being drawn
The FPC is not applied when the sample is drawn from a population of over 5,000 youth.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.