Use this calculator when the result affects pricing, operations, capacity, scheduling or management reporting.
What this calculator measures
Survey and experiment planning requires knowing the minimum sample size for statistical significance. This tool computes required sample size for proportions and means with confidence level and power adjustment.
What you get
Structured summary with threshold alerts, hidden drivers and export-ready report output.
What this calculator helps decide
Use this calculator when you need to decide whether current inputs sit inside acceptable exposure bands, which driver to investigate first, and whether to reprice, reschedule or redesign before repeating the work.
What the report includes
- Executive summary with threshold status
- Hidden loss driver breakdown
- Suggested actions and assumption notes
- Export-ready PDF and CSV on paid access
What the preview does not include
The free preview shows sample structure only. Full threshold checks, hidden driver breakdown, suggested actions and export-ready PDF or CSV require paid access.
Assumptions used
- Proportion test: n = Z²·p·(1-p)/ε². Mean test: n = (Z·σ/Δ)².
- p̂=0.50 gives conservative maximum sample size for proportion tests.
FAQ
- What does this calculator measure?
- Sample Size & Power Calculator measures hidden loss exposure and operating drivers from the inputs you provide, with threshold interpretation against stated bands.
- What is included in the pro decision report?
- The decision report includes executive summary, hidden driver breakdown, threshold check, suggested actions, assumption notes and export-ready output on paid access.
- Is this a replacement for ERP or professional advice?
- No. SectorCalc is a calculator and decision-report layer. It does not replace ERP, accounting systems or professional financial, legal or engineering advice.
