During a year end an audit, discrepancies were found in a company’s invoice ledger. Consequently, the controller had all invoices in the year checked to determine if they were correctly recorded in the ledger. The proportion of incorrectly recorded invoices was found to be 0.04. The controller instituted a new procedure for processing invoices. Subsequently a random sample of 500 invoices was checked to determine whether the proportion of incorrectly recorded had changed from 0.04. a) Perform a hypothesis test at 5% level if eleven of the sample invoices were recorded incorrectly.
b) What is implied by the test result?​

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Which statement below best describes george waring's approach to solving the problems of water-borne illness? a. waring is going with his "gut," because he believes that instincts and emotions are the best guides for action. b. waring efficiently and thoroughly lays out the case for why the problems are too large and overwhelming to be solved: people should just move out of cities back to their farms. c. waring has gathered the testimonies of people who live in densely populated areas in order to learn how they themselves have solved their problems. d. waring exhibits the industrial age's increased respect for and reliance on science and the scientific method.