Problem 2 Attribute Sampling For the following three control attributes, you want to be 90 percent condent that the population deviation rate does not exceed 7.5 percent. Attribute 1-The purchase order was approved (purchasing department stamp provides evidence) Attribute 2-The purchase order, receiving report, and vendor invoice are included in each voucher packet Attribute 3The accounts payable department compared product and quantities across the three documents (initials by an accounts payable clerk and auditor reperformance provide evidence) You tested a sample of 52 voucher packages and discovered the following deviations: . Attribute 1: 2 deviations - Attribute 2: 1 deviation - Attribute 3: 0 deviations With any ACL project open (e.g., Roger Company) evaluate the results of your testing by: 1. Select Sampling >> Evaluate Error 2. Make sure Record is the selected sample type 3. Enter the applicable parameters (e.g., Condence is 90 and Sample Size is 52, Number of Errors or deviations listed above) 4. Click OK What is the upper error limit frequency for each attribute? Based on the results of your controls testing, which controls are considered effective? Please explain why or why not