AOAC SPIFAN Review Team (August 2016)

Table 2

Nominal

stat

‐value

Mean

stat

where: = mean of the differences between measured results and reference value

sd = standard deviation of the differences between results and reference value

= number of replicate analyses of SRM

: = 0, The null hypothesis is that there is no difference between the measured results and the certified value:

‐value: is the probability (at the 95% levels of confidence) of obtaining the test statistic assuming that the null hypothesis is true

‐value < 0.05 indicate a difference of statistical signifance between measured results and SRM

Uncertainty Certified range Concentration Difference from

certified value

Confidence interval

Bias

Accuracy ‐ Analytical bias compared to reference material

Certified Reference Material

Measured Results

CRM product

Analyte

Certified value

crit

SPIFAN ERP Checklist v1.0

95% confidence interval: The true population of the measured value expected to fall within the confidence interval estimate 95% of the time

lower limit = mean ‐

upper limit = mean +

where: = critical values of the t‐distribution

sd = standard deviation of the differences between results an reference value

= number of replicate analyses of SRM

CAROT-02 MEF FORM (AUGUST 2016)

FOR ERP USE ONLY

DO NOT DISTRIBUTE