40 Smith CPA is using attributes sampling to test Swimmer In

40) Smith, CPA, is using attributes sampling to test Swimmer Inc.\'s internal controls related to the accuracy of sales invoices. Smith defined the population as all 5,000 of Swimmer\'s sales invoices and determined the appropriate sample size was 200 invoices. What is Smith\'s sampling interval if systematic random selection is used?

Choices:

20

25

50

250

Solution

answer is 25

for eg.

Sampling Interval = the number of households in the population divided by the number of households needed for the sample

   hence in given question Smith defines the population as all 5,000 of Swimmer\'s sale invoice

sample size = 200 invoices

sampling interval = population size / sample size

       = 5,000/ 200

      = 25