ACS 2009-3yr Summary File: Technical Documentation - Survey ACS 2009 (3-Year Estimates)

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Documentation:

ACS 2009 (3-Year Estimates)

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Publisher: U.S. Census Bureau

Survey: ACS 2009 (3-Year Estimates)

Document:	ACS 2009-3yr Summary File: Technical Documentation
citation:	Social Explorer; U.S. Census Bureau; American Community Survey 2007-2009 Summary File: Technical Documentation.

Documentation

ACS 2009 (3-Year Estimates)

ACS 2009-3yr Summary File: Technical Documentation

Chapter 1. Introduction

1.1. The American Community Survey

1.2. The American Community Survey Summary File

1.3. Topics and Geographies Covered

1.4. Tools for Obtaining Data

1.5. Notable Changes to the Summary File

1.6. Contact Us

Chapter 2. How to Use the ACS Summary File

2.1. Locating the Summary File

2.2. Summary File Organization

2.3. Sequence Numbers

2.4. Geography File

2.5. Layout of the Geography File

2.6. Estimate and Margin of Error Files

2.7. Instructions for Applying Statistical Testing to 2005-2009 ACS 5-Year Data

2.7.1. Obtaining Standard Errors

2.7.2. Obtaining Standard Errors for Derived Estimates

2.7.3. Instructions for Statistical Testing

Chapter 3. User Tools

3.1. Summary File Excel Retrieval Tool

3.2. Summary File SAS Tool

3.3. Summary File Excel Import Tool

Chapter 4. User References

4.1. Detailed Tables for ACS 2007-2009 & 2005-2009 Multiyear Data

4.2. ACS 2007-2009 & 2005-2009 Multiyear Summary Levels/Components For Detailed Tables

4.3. Sequence Number and Table Number Lookup

4.4. Table Shells List

4.5. Excel Geography Files

Appendix A. Supplemental Documentation

2009 Code List

2009 Subject Definitions

Group Quarters Definitions

Group Quarters

American Community Survey: Multiyear Accuracy of the Data

Introduction

Data Collection

Sample Design

Weighting Methodology

Estimation Methodology for Multiyear Estimates

Confidentiality of the Data

Errors in the Data

Measures of Sampling Error

Calculation of Standard Errors

Testing for Significant Differences

Examples of Standard Error Calculations

Issues with Approximating the Standard Error of Linear Combinations of Multiple Estimates

Puerto Rico Community Survey: Multiyear Accuracy of the Data

Measures of Sampling Error

Confidence Intervals and Margins of Error

Calculation of Standard Errors

Testing for Significant Differences

Examples of Standard Error Calculations

Issues with Approximating the Standard Error of Linear Combinations of Multiple Estimates

Appendix B. Graphical Representation of ACS Summary File Organization

B.1. 2005-2009 ACSSF All In 2 Giant Files (Experienced-Users-Only)

B.2. 2005-2009 ACSSF By State All Tables

B.3. 2005-2009 ACSSF By State By Sequence Table Subset

Appendix C. User Notes

C.1. Jam Values

C.2. Rounding Rules, Margin of Errors (MOE)

C.3. Display of Estimates

C.4. Sequences Used Only for United States Tables or Only for Puerto Rico Tables

C.5. Multiple Sequences For a Table

Tables That Are Contained in More Than One Sequence File

Appendix D. Examples

D.1. Creating a Table

D.2. Creating a Table Using SAS

Appendix E. Detailed Tables for ACS 2007-2009 Data

Social Explorer; U.S. Census Bureau; American Community Survey 2007-2009 Summary File: Technical Documentation.

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