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10 Cards in this Set
- Front
- Back
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When is attribute sampling appropriate? |
for discrete variables e.g. test of controls |
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On which four factors does the sample size for an attribute test depend? |
- confidence level (the greater it is, the larger the sample size) - population size (the larger it is, the larger the sample size, except for very large population) - expected deviation rate (the greater the expected variability in the population, the larger the sample size) - tolerable deviation rate ( the higher the desired precision , the larger sample size) |
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How is the planned precision in attribute sampling calculated? |
- tolerable deviation rate minus expected deviation rate |
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How does the size of the planned precision influence the sample size? |
the tighter the planned precision, the larger larger the sample size |
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what are the other two attribute sampling methods? |
- discovery sampling - stop-or-go sampling |
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When is discovery sampling appropriate? |
when even a single deviation (noncompliance) is critical |
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how is the sample size in discovery sampling calculated? |
in a way that it will include at least one instance of a deviation if deviations occur in the population at a given rate |
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what is stop or go sampling good for? |
for reducing the sample size when it is believed that the error rate in the population is low |
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how many sample items are examined in stop or go sampling? |
so many that it can be stated that the deviation rate is below a specified rate at a specified confidence interval |
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how can the desired result (a specified maximum level of noncompliance) be achieved in stop or go sampling? |
by expanding the sample if deviations are found |
