CISA-KR 문제 451
4
CISA-KR 문제 452
Variable sampling, on the other hand, is a method of audit sampling that is used to estimate the amount or value of a population by measuring a characteristic of interest, such as monetary value, quantity, or size.
Variable sampling is not appropriate for testing compliance with the data center's physical access log system, as the auditor is not interested in estimating the value of the population, but rather in testing whether the system is operating as intended.
Quota sampling and haphazard sampling are both examples of non-statistical sampling methods that do not use probability theory to select a sample. Quota sampling involves selecting a sample based on certain criteria or quotas, such as age, gender, or location. Haphazard sampling involves selecting a sample without any specific plan or method. Both methods are not suitable for testing compliance with the data center's physical access log system, as they do not ensure that the sample is representative of the population and do not allow the auditor to measure the sampling risk or project the results to the population.
Therefore, attribute sampling is the most useful sampling method for an IS auditor conducting compliance testing for the effectiveness of the data center's physical access log system.
References:
* Audit Sampling - What Is It, Methods, Example, Advantage, Reason
* ISA 530: Audit sampling | ICAEW
CISA-KR 문제 453
Detection risk is the risk that the auditor will not detect a material misstatement that exists in an assertion1. Detection risk depends on the effectiveness of the audit procedures and how well they are applied by the auditor1.
The selection of a sampling methodology is part of the design of audit procedures, which aims to reduce detection risk to an acceptable level1. The auditor should consider the following factors when selecting a sampling methodology23:
The objectives of the audit procedure and the related assertions.
The characteristics of the population from which the sample will be drawn, such as its size, homogeneity, and structure.
The sampling technique to be used, such as random, systematic, haphazard, or judgmental.
The sample size and the method of selecting sample items.
The evaluation of the sample results and the projection of errors to the population.
The auditor should also consider the advantages and disadvantages of different sampling methodologies, such as statistical and non-statistical sampling23. Statistical sampling is a sampling technique that uses random selection and probability theory to evaluate sample results. Non-statistical sampling is a sampling technique that does not use random selection or probability theory to evaluate sample results. Some of the advantages and disadvantages are as follows23:
Statistical sampling allows the auditor to measure and control sampling risk, which is the risk that the sample is not representative of the population. Statistical sampling also allows the auditor to quantify the precision and reliability of the sample results. However, statistical sampling requires more technical knowledge and skills, as well as more time and cost, than non-statistical sampling.
Non-statistical sampling relies on the auditor's professional judgment and experience to select and evaluate sample items. Non-statistical sampling is more flexible and less complex than statistical sampling. However, non-statistical sampling does not provide an objective basis for measuring and controlling sampling risk, nor does it allow the auditor to quantify the precision and reliability of the sample results.
Therefore, the type of risk that would most influence the selection of a sampling methodology is detection risk (option D), as it determines how effective and efficient the audit procedures should be in order to provide sufficient appropriate audit evidence.
References: 1: Audit Sampling - Overview, Purpose, Importance, and Types 2: Audit Sampling | Auditing and Attestation | CPA Exam FAR 3: Audit Sampling | ACCA Qualification | Students | ACCA Global
CISA-KR 문제 454
CISA-KR 문제 455
387
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