Page 275 - Natural Antioxidants, Applications in Foods of Animal Origin

254 Natural Antioxidants: Applications in Foods of Animal Origin
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Required Samples to Confidently Report Analytical Information
1 sample z test
1.0
Sem~le
Size
0.8 ~--r-----=------.--- 32
1 Assumf>lions
Alpha 0.05
'
0.6 -<• ' ~-----~------r- StDev 10
(;:; I Alternative Not=
~
"- 0 '
0.4 ~---
' ' '
'
0
0.2 ,------r I ,-----T----
I 1
I '
' I
0.0 '
-6 -4 -2 0 4 6
Detection Difference For Reference Analytical Method
FIGURE 6.39(a) For the purpose of illustration, a generalized “reference” analytical
method, with a standard deviation of 10 requires that 32 samples be collected and analyzed.

Required Sarnples to Confidentlly Report Analytical Information
1 sarnple z test
1.0
I Semple
I Size
I I 8
0.8 ·---r-----:------:----
1 I I Assumptions
I I I
I I I 0.05
I I I I Alpha
I
I
I
I
0.6 ·-<- .... -----t------·- -+---- StDev 5
(;:; 1 1 I I I 1
5 I Alternative Not=
0 I
CL . .J ___ _ I I
I
0.4 I ----L--- ---~---
1
1
I I
I I
I I
0.2
-6 -4 -2 0 2 4 6
Detection Difference For Modified Analytical Method
FIGURE 6.39(b) With a standard deviation of 10 for this “modified” analytical method, 8
samples instead of 32 provides the quality of information needed.