AOAC-RI ERP Book Micro Jan 19 2017

Table 4. Quantities and Percentages of True Positive, True Negatives, False Positives, and False Negatives for the Candidate Method Testing of Ground Beef, 18hr Enrichment

Final Result 1 True Positive True Negative False Negative False Positive True Positive True Negative False Negative False Positive True Positive True Negative False Negative False Positive

Inoculation Level

Total

Percentage (%)

5 0 0 0 9 0 0 0 5 0 0

100

0 0 0

High

45 55

11

Low

0 0 0 0 0

100

Un-inoculated

1. TRUE POSITIVE, ““Screening Stage”” Positive Result - ”Confirmation Stage” Positive Result; TRUE NEGATIVE, “Screening Stage” Negative Result - ”Confirmation Stage” Negative Result; FALSE POSITIVE, “Screening Stage” Positive Result- ”Confirmation Stage” Negative Result; FALSE NEGATIVE, “Screening Stage” Negative Result - ”Confirmation Stage” Positive Result

CONFIDENTIAL INFORMATION Page 9 of 13