chapter 5 Flashcards
Variable sampling (numerical quantity)
Used in substantive testing of account balances. Estimate of $$
Attribute sampling (rate of occurrence)
Primarily used to test IC
Statistical sampling
Auditors specifies accepted sampling risk and then calculate the sample size.
Quantitative approach – judgment required
Non-statistical sampling
Sample size is not determined mathematically - results evaluated judgmentally
Planning consideration - attribute sampling
1) objective of controls
2) tolerable deviation rate
3) auditors allowable risk of assessing control risk too low
4) characteristics of the population
Upper deviation rate
What auditor concerned with – worst case scenario
Steps for testing controls/attribute sampling
1) define the objective of the test
2) define the population
3) define the sampling unit
4) define the attributes of interest
5) determine the sample size
Discovery sampling
Used for detecting fraud/critical items; when auditor believes the population deviation rate is zero or near zero
Planning consideration - variable sampling
1) the relationship of the sample to the relevant audit objective
2) preliminary estimates of materiality levels
3) auditor allowable risk of incorrect acceptance
4) characteristics of the population
Variable sampling plan: ratio estimation
Plan uses the ratio of the audited values of items to their book values to project the true population
Variable sampling plan: mean-per-unit estimation
Plan that uses the avg value of the items in the sample to estimate the true population value. Doesn’t require book value
Variable sampling plan: Difference estimation
Sampling plan that uses the avg difference btwn the audited values of items and their book values. Used instead of ratio estimation when the differences are not nearly proportional to book values
Steps for testing variable/substantive testing sampling
1) define the objective of the test
2) define the population
3) define the sampling unit
4) determine sample size
PPS sampling
Technique where the sampling unit is defined as an individual dollar in a population
Advantages of PPS Sampling
1) automatically emphasizes larger items by stratifying the sample.
2) if no errors are expected PPS sampling generally required a smaller sample than other methods
DisAdvantages of PPS Sampling
Zero balances, negative balances and understated balances generally require special design considerations
Indicators of material weakness
- ID of any type of fraud perpetrated by senior mgmt
- restatement of previously issued FS
- ID by the auditor of a material misstatement that would not have been detected
- ineffective oversight by those charged with governance
NONISSUER – Communicate the deficiency to mgmt in writing
Significant deficiency and material weakness