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ABC Companys internal auditor claims that 15% of the companys invoices are incorrect. To test his claim a random sample of 250 invoices is checked
ABC Companys internal auditor claims that 15% of the companys invoices are incorrect. To test his claim a random sample of 250 invoices is checked and 45 are found to be incorrect. Test at 1% significant level if the internal auditors claim is supported by the sample evidence. Critical Value = 2.58
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