Final answer:
The statement 'Samples are representative of all items available for testing' is not a limitation of an audit; it's an assumption, whereas limited access to information, judgment requirements, and fraud concealment are actual audit limitations.
Step-by-step explanation:
The question pertains to identifying which statement is not a limitation of an audit. The answer is 2) Samples are representative of all items available for testing. This statement is actually an assumption that auditors make when performing an audit, rather than a limitation. In reality, although auditors strive to ensure their samples are reflective of the entire data set, the nature of sampling inherently means there's a risk the samples might not be perfectly representative. However, this risk is managed through careful sample selection and is not considered a limitation. In contrast, limitations such as limited access to information, the requirement for judgment in accounting, and the concealment of evidence by fraud perpetrators are challenges auditors face that can constrain the effectiveness of an audit.
Examples of these limitations can be seen in case studies with control-related challenges and measuring biases, as well as the complexities introduced by imperfect information affecting transactions in the business world. Further, another relevant limitation not mentioned would be the potential inaccuracy of responses in surveys, highlighting a broader issue with data reliability in various research and audit contexts.