45 C.F.R. § 1356 app C to Part 1356

Current through November 30, 2024
Appendix C to Part 1356 - Calculating Sample Size for NYTD Follow-Up Populations

1. Using Finite Population Correction

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.

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(Py)(Pn), an estimate of the percent of responses to a dichotomous variable, is (.50)(.50) for the most conservative estimate.

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Acceptable level of error = .05 (results are plus or minus five percentage points from the actual score) Z = 1.645 (90 percent confidence interval)

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N = number of youth from whom the sample is being drawn

2. Not Using Finite Population Correction

The FPC is not applied when the sample is drawn from a population of over 5,000 youth.

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45 C.F.R. 1356 app C to Part 1356

73 FR 10372 , Feb. 26, 2008