What is the benefit of using statistical sampling versus nonstatistical sampling?

Statistical sampling: Uses laws of probability for selection and evaluation of a sample. Allows for quantification of audit risk and sufficiency of audit evidence. Nonstatistical sampling: Does not utilize statistical models in calcualtions. Uses a non-mathematical approach to determine sample sizes and evaluate the selected samples.

1. 135° = obtuse angle

2. 245° = Reflex angle

3. 62° = acute angle

4. 110° = obtuse reflex angle