Exam 9: Audit Sampling: An Application to Substantive Tests of Account Balances
Monetary-unit sampling is based on attribute sampling concepts.
True
The purpose of audit sampling is to draw inferences about the entire population from the results of a sample.
True
Describe two advantages and two disadvantages of monetary-unit sampling (MUS).
Should include two advantages and disadvantages from the following:
Advantages:
1. When the auditor expects no misstatements, MUS sample size can be computed and usually results in a smaller sample size than classical variables sampling.
2. The calculation of the sample size and the evaluation of the sample results are not based on the variation between items in the population.
3. When applied using a probability-proportional-to-size sample selection procedure, MUS automatically results in a stratified sample because sampled items are selected in proportion to their dollar amounts. In effect, larger dollar items have a higher probability of being selected.
Disadvantages:
1. The selection of zero or negative balances generally requires special design consideration.
2. If the auditor detects items that are in error by more than 100 percent, special adjustments will be necessary when calculating sample results.
3. When more than one or two misstatements are detected using a MUS approach, the sample results calculations may overstate the allowance for sampling risk.
Using nonstatistical sampling, which of the following courses of action would an auditor most likely follow in planning a sample of cash disbursements if the auditor is aware of several unusually large cash disbursements?
An auditor established a $60,000 tolerable misstatement for an account balance of $1,000,000. The auditor selected a sample of every twentieth item from the population of 1,000 items that represented the asset account balance and discovered overstatements of $3,700 and understatements of $200. Under these circumstances, the auditor most likely would conclude that:
The accounting department reports that the balance of accounts receivable is $210,000. You are willing to accept that balance if audit sampling suggests it is within $15,000 of the actual balance. Using a classical variables sampling plan, you compute a 95% confidence interval of $208,000 to $225,000. You would therefore:
A number of factors influence the sample size for a substantive test of details of an account balance. All other factors being equal, which of the following would lead to a larger sample size?
Classical variables sampling uses normal distribution theory to evaluate the characteristics of a population based on sample data.
Haphazard selection allows the auditor to select items with bias.
In a monetary-unit sample with a sampling interval of $10,000, an auditor discovered that a selected account receivable with a recorded amount of $5,000 had an audit amount of $2,000. The projected misstatement of this sample was:
An auditor is performing substantive procedures of pricing and extension of perpetual inventory balances consisting of a large number of items. Past experience indicates numerous pricing and extension errors. Which of the following statistical sampling approaches is most appropriate?
Summarize the concept behind monetary-unit sampling (MUS). How does MUS use attribute-sampling theory?
In statistical or nonstatistical sampling methods used in substantive testing, an auditor most likely would stratify a population into meaningful groups if:
The size of the upper limit on misstatement is largely dependent on the sample size, which is inversely related to the desired confidence level.
While performing a substantive test of details during an audit, the auditor determined that the sample results supported the conclusion that the recorded account balance was materially misstated. It was, in fact, not materially misstated. Such a situation illustrates the risk of:
An accounts receivable account balance is $500,000 and the auditor determines a sample size of 30 would provide adequate assurance. The auditor plans to use a monetary-unit sampling plan with systematic sample selection. The auditor notices that there are six customer accounts of at least $15,000 and would like the systematic selection technique to select all items that are at least $15,000, even if that means the sample size is slightly larger than 30. To achieve the auditor's objectives, the sampling interval should be:
Monetary-unit sampling is said to eliminate the need to stratify the sample because:
The confidence factor for nonstatistical sampling is based on:
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