9/10/2014 Copyright 2006,2012 by AOAC International, all rights reserved.
AOAC International Interlaboratory Study Workbook
Version:
2.1
Blind (Unpaired) Replicates
Study name:
Study date:
7/24/2014
Study Reported Values
Seq.
Item
Symbol
Sample ID:
CLC10-B
E29VLV
1
Total number of laboratories
p
10
a
10
b
2
Total number of replicates
Sum(n(L))
20
20
3
Overall mean of all data (grand mean)
f
XBARBAR
43.6551
0.4280
4
Repeatability standard deviation
s(r)
3.0112
0.0208
5
Reproducibility standard deviation
s(R)
3.8583
0.0305
6
Repeatability relative standard deviation
RSD(r)
6.90
4.85
7
Reproducibility relative standard deviation
RSD(R)
8.84
7.13
8
HORRAT value
0.34
0.20
a
One laboratory excluded - Failed Single and Double Grubbs Test
b
One laboratory excluded - Failed Single Grubbs Test
c
One laboratory excluded - Failed Double Grubbs Test
d
Includes single determinations for 4 laboratories because of mislabeled product cans.
e
One laboratory excluded - Failed Cochran Test
f
Overall mean in mcg/100g RTF for all samples except CLC10-B. CLC10-B overall mean in mcg/kg powder
AOAC 2011.10 Determination of Vitamin B12
