BQS OBSP Determination:
NAPHTHALENE
METHOD: 2021 , TESTIDCODE: 34696GCM66
Open Data Set

The SGPlot Procedure

Plotted Points Statistics
NAPHTHALENE

Spike Level N Mean Std-Dev. Median F_Pseudo
< Reporting Level 24 83% 24% 87% 21%
>= Reporting Level 171 81% 14% 79% 13%
Total 195 81% 15% 79% 14%

Sample Statistics
NAPHTHALENE

Characteristic N % % Basis
Plotted 195 86% Spiked
Estimated Values 36 16% Spiked
Deleted Values 33 6% Spiked + Not Spiked
Spiked, Censored 28 12% Spiked
Spiked 260 .  
False Negatives 4 2% 4 out of 227
Not Spiked 248 .  
False Positives 0 0% 0 out of 248