Statistical Design of Experiments
Statistical Design of Experiments
Statistical Design of Experiments
Statistical Design of Experiments
Sources of Error
Sources of Error
Rounding
Rounding
-
-
Rounding off numbers either
Rounding off numbers either
up (over 0.5) or down (under 0.5).
up (over 0.5) or down (under 0.5).
Repeatability
Repeatability
-
-
Never repeat exactly the
Never repeat exactly the
same test conditions, therefore never get
same test conditions, therefore never get
exactly the same results.
exactly the same results.
Measurement
Measurement
-
-
Measurements are never
Measurements are never
perfect .. gages, volumes and weights are
perfect .. gages, volumes and weights are
all subject to errors in instruments and by
all subject to errors in instruments and by
operators.
operators.
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