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SAMPLING
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THIRD STANDARD OF FIELD WORK (AU 326.01) “SUFFICIENT COMPETENT EVIDENTIAL MATTER IS TO BE OBTAINED THROUGH INSPECTION, OBSERVATION, INQUIRIES, AND CONFIRMATIONS TO AFFORD A REASONABLE BASIS FOR AN OPINION REGARDING THE FINANCIAL STATEMENTS UNDER AUDIT.”
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AUDIT RISK LIKELIHOOD OF ISSUING AN UNQUALIFIED OPINION ON MATERIALLY MISSTATED FINANCIAL STATEMENTS AR = IR x CR x DR
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SAMPLING RISK LIKELIHOOD THAT THE SAMPLE IS NOT REPRESENTATIVE OF THE POPULATION, THEREFORE INCORRECT CONCLUSION
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NON-SAMPLING RISK NOT DUE TO EXAMINING LESS THAN 100% HUMAN ERROR MINIMIZE BY PLANNING, SUPERVISION, QUALITY CONTROL
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TESTS OF CONTROLS RISK OF ASSESSING CONTROL RISK TOO LOW –OVERRELY ON CONTROL RISK OF ASSESSING CONTROL RISK TOO HIGH –UNDERRELY ON CONTROL
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SUBSTANTIVE TESTS RISK OF INCORRECT ACCEPTANCE RISK OF INCORRECT REJECTION
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STATISTICS QUANTIFY SAMPLING RISK CONFIDENCE (1 - RISK) PRECISION (RELATES TO MATERIALITY)
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SAMPLING TECHNIQUES ATTRIBUTE SAMPLING –TESTS OF CONTROLS –RATE OF DEVIATION (OCCURRENCE, EXCEPTION) VARIABLES SAMPLING –SUBSTANTIVE TESTS –DOLLAR AMOUNT
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ATTRIBUTE SAMPLING SPECIFY THE AUDIT OBJECTIVES –ASSESS CONTROL RISK DEFINE THE EXCEPTION CONDITIONS –MINIMIZE NON-SAMPLING RISK DEFINE THE POPULATION –ALL THE ELEMENTS OF A BALANCE OR CLASS OF TRANSACTIONS –EACH ELEMENT SELECTED FOR TESTING IS A SAMPLING UNIT
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DETERMINE SAMPLE SIZE –SAMPLING RISK –TOLERABLE DEVIATION RATE –EXPECTED POPULATION DEVIATION RATE –POPULATION SIZE
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SELECT THE SAMPLE –RANDOM –SYSTEMATIC PERFORM THE AUDIT PROCEDURES
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EVALUATE THE RESULTS –CALCULATE SAMPLE DEVIATION RATE –RELATE TO TOLERABLE RATE AND RISK OF ASSESSING CONTROL RISK TOO LOW –FOLLOW UP DEVIATIONS DOCUMENT TEST IN WORKPAPERS
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