Certified Public Accountant Auditing and Attestation examination.
Auditors collect evidence to support their opinions. Evidence can be physical (inventory), documentary (invoices), or analytical (ratios).
Since reviewing every transaction is impractical, auditors use sampling – selecting a subset to draw conclusions about the whole.
Auditors weigh the reliability and sufficiency of evidence. Reliable evidence from independent sources is most valuable.
An auditor confirms a bank balance by contacting the bank directly.
A random sample of invoices is checked for proper approval.
Audit evidence and sampling help auditors form opinions without examining every transaction.