1. Using random numbers to select a sample

A.	Is required for a variables sampling plan.
B.	Is likely to result in an unbiased sample.
C.	Results in a representative sample.
D.	Allows auditors to use smaller samples.

A sample size of 50 purchase orders was selected for testing by the auditor. The results were above the desired deviation rate of 2%. The audit manager increased the sample size to 75 purchase orders. This is an example of

A.	Stratified mean-per-unit sampling.
B.	Discovery sampling.
C.	Block sampling.
D.	Stop-or-go sampling.

The internal auditor for an insurance company is conducting an audit of claims processing and wants to assess the average length of time taken to process automobile claims to determine whether processing is being completed within standards set by company policy. The auditor plans to take a sample of claims made during the year and perform the needed analysis. The most appropriate sampling method is

A.	Mean-per-unit variables sampling.
B.	Probability-proportional-to-size sampling.
C.	Attribute sampling.
D.	Discovery sampling.

Variability of the monetary amount of individual items in a population affects sample size in which of the following sampling plans?

A.	Attribute sampling.
B.	Monetary-unit sampling.
C.	Mean-per-unit sampling.
D.	Discovery sampling.

The use of probability-proportional-to-size sampling is inefficient if

A.	Bank accounts are being examined.
B.	Statistical inferences are to be made.
C.	Each account is of equal importance.
D.	The number of sampling units is large.

To use stratified variables sampling to evaluate a large, heterogeneous inventory, an appropriate criterion for classifying inventory items into strata is

A.	Monetary values.
B.	Number of items.
C.	Turnover volume.
D.	Storage locations.

Which of the following types of audit documentation is an example of structured data

A.	Aged accounts receivable schedules.
B.	Engagement letter.
C.	Emails.
D.	Surveillance photos.