324 / 1224
How to Add Various Error Contributions?
For a simple criteria as a probability level of the minimum dose the
systematic error and random error are added linearly
For various systematic errors and various random errors the errors (SDs)
should be
added in quadrature
:
)10(9.10 3 3 10
2
2
2
2
2
2
= + + =Σ
Σ+Σ+Σ=Σ
c
b
a
Emphasis on large errors!