Medium1 markMultiple Choice
Area III: Performing ProceduresEvidenceSamplingAttribute Sampling

CPA · Question 42 · Area III: Performing Procedures

An auditor is using attribute sampling to test a control. The auditor specifies a tolerable deviation rate of 5%, a risk of assessing control risk too low of 5%, and an expected population deviation rate of 1%. The sample size is 93. The auditor finds 1 deviation. The table shows that for 1 deviation in a sample of 93, the upper deviation rate is 4.8%. What is the auditor's conclusion?

Answer options:

A.

The control is not effective because deviations were found.

B.

The control is operating effectively because the upper deviation rate (4.8%) is less than the tolerable deviation rate (5%).

C.

The control is not effective because the sample deviation rate (1.07%) is greater than the expected rate (1%).

D.

The auditor should increase the sample size to be sure.

How to approach this question

Compare Upper Deviation Rate to Tolerable Deviation Rate. 4.8% < 5.0% -> Good.

Full Answer

B.The control is operating effectively because the upper deviation rate (4.8%) is less than the tolerable deviation rate (5%).✓ Correct
The control is operating effectively because the upper deviation rate (4.8%) is less than the tolerable deviation rate (5%).
In attribute sampling, the auditor compares the Upper Deviation Rate (which includes the allowance for sampling risk) to the Tolerable Deviation Rate. Since 4.8% < 5%, the auditor can conclude that the control is operating effectively with the desired level of confidence.

Common mistakes

Comparing sample rate to expected rate.

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