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10 Cards in this Set

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When is attribute sampling appropriate?

for discrete variables e.g. test of controls

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)

How is the planned precision in attribute sampling calculated?

- tolerable deviation rate minus expected deviation rate

How does the size of the planned precision influence the sample size?

the tighter the planned precision, the larger larger the sample size

what are the other two attribute sampling methods?

- discovery sampling

- stop-or-go sampling

When is discovery sampling appropriate?

when even a single deviation (noncompliance) is critical

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

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

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

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