CPA Auditing and Attestation (AUD)

Certified Public Accountant Auditing and Attestation examination.

Advanced Topics

Audit Evidence and Sampling

Gathering Audit Evidence

Auditors collect evidence to support their opinions. Evidence can be physical (inventory), documentary (invoices), or analytical (ratios).

Types of Evidence

  • Physical Inspection: Counting cash or inventory.
  • Confirmation: Getting third-party verification.
  • Observation: Watching processes in action.
  • Recalculation: Checking math accuracy.

Audit Sampling

Since reviewing every transaction is impractical, auditors use sampling – selecting a subset to draw conclusions about the whole.

Sampling Methods

  • Statistical Sampling: Uses math to determine sample size and selection.
  • Non-statistical Sampling: Relies on auditor judgment.

Balancing Evidence

Auditors weigh the reliability and sufficiency of evidence. Reliable evidence from independent sources is most valuable.

Examples

  • An auditor confirms a bank balance by contacting the bank directly.

  • A random sample of invoices is checked for proper approval.

In a Nutshell

Audit evidence and sampling help auditors form opinions without examining every transaction.

Key Terms

Sampling
Selecting a portion of items for testing to draw conclusions about the whole.
Confirmation
Direct communication with third parties to verify information.