Detailed Answer
(a) The requirement is to identify the correct statement
concerning statistical sampling for tests of controls. Answer (a)
is correct because population size has little or no effect on sample
size. Answer (b) is incorrect because the population deviation
rate has a significant effect on sample size. Answer (c) is
incorrect because sample size increases to a much lesser extent
than doubling as the population size doubles. Answer (d) is
incorrect because for a given tolerable rate, a smaller, and not a
larger, sample size should be selected as the expected population
deviation rate decreases.