Audit Execution
Audit Sampling Techniques
Learn statistical and judgmental sampling methods for efficient auditing
2026-01-03
Audit Sampling enables auditors to draw conclusions about an entire population by examining a representative subset. Proper sampling design is critical for audit efficiency and reliability.
🎲 Statistical Sampling Methods
- Random Sampling: Every item has equal selection probability
- Systematic Sampling: Select every nth item from the population
- Stratified Sampling: Divide population into groups and sample each
- Monetary Unit Sampling: Probability proportional to dollar value
🎯 Non-Statistical Sampling
Judgmental sampling based on auditor expertise:
- High-risk or high-value items
- Items with known issues or complaints
- Representative mix of transaction types
- Items from specific time periods or locations
📏 Determining Sample Size
Consider confidence level, tolerable error rate, expected error rate, and population size. Use statistical formulas or tables for statistical samples; apply professional judgment for non-statistical approaches.
💡 Pro Tip
Document your sampling methodology, rationale, and results thoroughly. This ensures transparency and enables others to evaluate the reasonableness of your conclusions.