CDC en Español

National Center for Health Statistics Monitoring the Nation's Health

Trends in Health and Aging
supported by the National Institutes on Aging

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Statistical Tests

We invite you to try our statistical testing utility. It allows the user to perform significance tests of:

  • the difference between two values,
  • multiple comparison (Bonferroni Test)
  • the slope of a linear trend line, and
  • the difference in the slopes of two linear trend lines.

You can use the web-based utility by typing the values to be tested and their standard errors in the designated text boxes of the web-based utility at http://205.207.175.93/utils. The results will appear in the box at the bottom of the screen.

 

To test the data in the Beyond 20/20 Browser, go to the Tools menu. To add the utility to the Beyond 20/20 Browser software, download the installation file posted at ftp://ftp2.beyond2020.com/outgoing/NCHS/setup.exe and run the setup program. Once you have run Install you will see eight items in your Tools menu in the Beyond 20/20 table, including Help for each statistical test. Please note that the statistical testing in the downloadable Beyond 20/20 tables (unlike the web-based utility) cannot perform trend tests when there are unequal intervals of the independent variable (e.g., testing a trend when the data years are 1995, 1996, and 1999.)

 

Please send your comments, questions, and suggestions about the Statistical Utility to nha@cdc.gov.

Page Last Modified: September 03, 2008

Our Links

Contact Trends in Health and Aging

Aging and Chronic Disease Statistics Branch
3311 Toledo Road
Hyattsville, MD 20782
301-458-4241
Email: nha@cdc.gov

 

National Center for Health Statistics
3311 Toledo Road
Hyattsville, MD 20782
Phone:
1-800-232-4636
cdcinfo@cdc.gov

Safer Healthier People

Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
Tel: (404) 639-3311 / Public Inquiries: (404) 639-3534 / (800) 311-3435