Contents
INTRODUCTION 1
WHAT IS THE S-DHC? 1
WORKING WITH THE DATA 2
HOW PHSAFE AND POSTPROCESSING METHODS WORK 3
UNDERSTANDING THE ACCURACY OF THE S-DHC 11
HOW DOES DISCLOSURE AVOIDANCE FOR S-DHC COMPARE WITH OTHER 2020 CENSUS PRODUCTS? 12
HOW HAS DATA USER FEEDBACK INFORMED THE PLANNING PROCESS? 12
WHERE CAN I LEARN MORE? 12
TECHNICAL APPENDIX A 14
Table 1. Illustration of Truncation for Household Maximum of Ten People 4
Table 2. Illustration of Truncation for Household Maximum of Six People Under the Age of 18 5
Table 3. Number and Percentage of Households That Exceed Truncation Threshold by Race and Hispanic Origin: United States 6
Table 4. Households That Exceed Truncation Threshold by State 7
Table 5. Difference Between Truncated S-DHC Household Population Count and DHC Household Population Count by Race and Hispanic Origin 8
Table 6. Difference Between Truncated S-DHC Household Population Count and DHC Household Population Count by State 9
Table 7. Noise Infusion Occurs at Innermost Cells Only; Subtotals and Totals Are Calculated Later by Aggregating Across the Detailed Cells 10
Table 8. Comparison of TopDown Algorithm With the Safe Suite (SafeTab-P, SafeTab-H, and PHSafe) 13
Figure 1. Steps in the PHSafe and Statistical Postprocessing Method 3
Appendix Table 1. Margins of Error (±) by Level of Geography and Characteristic Detail 15