Geological assay detection-limit scenarios calculator

Calculate substitution-policy means and censored fraction with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use substitution-policy means and censored fraction to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Assays [value or detection limit,censored flag 0/1]
[[2,0],[1,1],[4,0],[1,1]]
Substitution-policy means
[1.5,1.75,2]
Censored fraction
0.5

Try another scenario

Assays [value or detection limit,censored flag 0/1]
[[3,0],[1,1],[5,0],[1,1]]
Substitution-policy means
[2,2.25,2.5]
Censored fraction
0.5
Calculation method

Calculation method

Substitution-policy means

[zero,half detection limit,full detection limit] means; censored values remain model scenarios, not measurements.

Censored fraction

Censored observation count/total.

Symbols and units
a
Assays [value or detection limit,censored flag 0/1]

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Values, censored flags, chosen substitution policies. Returns Summary sensitivity; no invented measurements. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification.
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