Questions requiring analysis One of the generally accepted auditing standards states that sufficient competent evidential matter is to be obtained through inspection, observation, inquiries, and confirmation to afford a reasonable basis for an opinion regarding the financial statements under audit. Some degree of uncertainty is implicit in the concept of "a reasonable basis for an opinion because the concept of sampling is well established in auditing practice. Required a. Explain the auditor's justification for accepting the uncertainties that are in the sampling process. b. Discuss the nature of sampling risks and nonsampling risk. Include the effect of sampling risk on substantive tests of details and on tests of internal control