170135_inorganicventures_flipping

Common Distributions

Normal • " = $ % (for 95%) • 1σ ≈ 68%

Rectangular • " = & ' • 1σ ≈ 58%

Triangular • " = & ( • 1σ ≈ 65%

Images from EURACHEM Guide Appendix E

Use of Existing Data

1. Comparable precision

Multiple days, analysts, instruments (repeatability/reproducibility)

2. Justified bias data

Repeated analysis, spike recovery, round robins, proficiency testing

3. Statistical control

Control charting