Two Sample Test of Proportions
Two Sample Test of Proportions
Non-Parametric MCL/ACL Comparison
See Also:
Non-Parametric Tolerance Limit
Confidence Interval MCL Comparison
Description:
The Two-Sample Test of Proportions is a non-parametric test is provided in the U.S. Navy 1999 Guidance Document as a test to determine compliance location observations are statistically elevated when compared to background and to a compliance limit such as MCL or site-specific action limit. The test is non-parametric, so it is suitable for non-normally distributed data and for a significant number of non-detects. In ChemStat, the test can be performed at the 99%, 97.5%, 95%, or 90% confidence levels.
Use:
Use the Two-Sample Test of Proportions to determine if site contamination exceed a specified action level such as an MCL.