Final answer:
The least important consideration in determining the sample size for confirmations is the population size as it has a minimal impact compared to risk assessments and deviation rates. The correct option is 1).
Step-by-step explanation:
When determining the sample size for confirmations in an audit, one must consider various factors. In this case, the least important consideration is the population size.
The other options, such as the acceptable risk of incorrect acceptance, expected deviation rate, and tolerable deviation rate, are directly related to the risk assessment and the effectiveness of the sampling. They have a more significant impact on the decision related to the sample size compared to the population size.
In practice, when the population is very large, an increase in size does not substantially change the required sample size due to the concept of diminishing returns once a certain threshold is reached. Option 1) is the correct one.