BQS OBSP Determination:
DI-N-BUTYL PHTHALATE
METHOD: 1383 , TESTIDCODE: 39110GCM57
Open Data Set

The SGPlot Procedure

Plotted Points Statistics
DI-N-BUTYL PHTHALATE

Spike Level N Mean Std-Dev. Median F_Pseudo
< Reporting Level 18 85% 17% 85% 12%
>= Reporting Level 34 79% 13% 80% 10%
Total 52 81% 14% 82% 11%

Sample Statistics
DI-N-BUTYL PHTHALATE

Characteristic N % % Basis
Plotted 52 93% Spiked
Estimated Values 15 27% Spiked
Deleted Values 2 2% Spiked + Not Spiked
Spiked, Censored 2 4% Spiked
Spiked 57 .  
False Negatives 2 4% 2 out of 56
Not Spiked 65 .  
False Positives 1 2% 1 out of 64