A scrap metal dealer claims that tye mean of its cash sales in no more than $80, although an Internal revenue service agent believes that the dealer is being dishonest. Observing a sample of 20 cash customers the agent finds the mean cash sales to be $91 with a standard deviation of $21. Assuming the popUlation is distributed Approximately normally, and using the 0.05 level of significance , will the agents suspicion be confirmed

Auditing: A Risk Based-Approach (MindTap Course List)
11th Edition
ISBN:9781337619455
Author:Karla M Johnstone, Audrey A. Gramling, Larry E. Rittenberg
Publisher:Karla M Johnstone, Audrey A. Gramling, Larry E. Rittenberg
Chapter8: Specialized Audit Tools: Attributes Sampling, Monetary Unit Sampling, And Data Analytics Tools
Section: Chapter Questions
Problem 17RQSC
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A scrap metal dealer claims that tye mean of its cash sales in no more than $80, although an Internal revenue service agent believes that the dealer is being dishonest. Observing a sample of 20 cash customers the agent finds the mean cash sales to be $91 with a standard deviation of $21. Assuming the popUlation is distributed Approximately normally, and using the 0.05 level of significance , will the agents suspicion be confirmed?

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