Final Exam Flashcards
Statistical sampling
an approach to sampling where random selection is used to select a sample and probability theory is used to evaluate the sample results
Non-statistical sampling
any sample selection method that does not have the characteristics of statistical sampling
Statistical sampling
Advantage and Disadvantage
An advantage of statistical sampling is that it allows an auditor to measure sampling risk; that is, the risk that the sample chosen by the auditor is not representative. Sometimes a disadvantage of statistical sampling is the cost involved in using this technique.
Non-statistical sampling
Advantage and Disadvantage
An advantage is that it is easier to use than statistical sampling, is lower cost, and allows an auditor to select a sample that they believe is appropriate
Disadvantge is that it is a not a random sample so it can be scewed
Most audit firms use a combination of _______ and ____________ as both methods provide appropriate audit evidence and allow the auditor to form a conclusion on the items being tested
statistical, non-statistical sampling
Examples of Non-statistical sampling
Haphazard selection
the selection of a sample without use of a methodical technique
Judgemental selection
the selection of items that an auditor believes should be included in the sample for testing
Examples of Statistical sampling
Random selection
process whereby a sample is selected free from bias and each item in a population has an equal chance of selection
Systematic selection (Inerval) the selection of a sample for testing by dividing the number of items in a population by the sample size, giving the sampling interval (n) and then selecting every nth item in the population
Block selection
the selection of items that are grouped together within the population of items available
Tests of controls (controls testing)
the audit procedures designed to evaluate the operating effectiveness of controls in preventing, or detecting and correcting, material misstatements at the assertion level
Preventive Control
Sales occur that are not collectable.
The computerized accounting program will not allow a sale to be processed if a customer has exceeded its credit limit.
Preventive Control
Fictitious employees are paid.
Amounts cannot be paid to employees without first matching a valid social insurance number to the employee master file.
Preventive Control
Sales are recorded at the wrong amount.
Sales invoices are automatically priced using a master pricing file
Preventive Control
Transactions are classified and coded to incorrect accounts.
The account coding on each purchase order is checked by the computer using a table of valid account numbers, and then various logic tests are performed by the computer.
Testing Controls
Enquiry
Observation
Inspection of physical evidence
Re-performance
Enquiry
This technique involves the auditor asking questions to determine how the control is performed and whether it appears to have been carried out properly and on a timely basis. For example, the auditor may ask the employees who prepare the sales invoices how they determine when to prepare the invoice and how they ensure that the revenue is recorded on a timely basis.
Observation
This technique involves the auditor observing the actual control being performed. For example, they may observe the preparation of an invoice to determine if the related shipping report has been received.