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The sales representative for a manufacturer of a new product claims that the product will increase...

The sales representative for a manufacturer of a new product claims that the product will increase output per machine by more than 29 units per hour. A line manager installs the product on 20 of the machines, and finds that the average increase was 31 with a standard deviation of 6.2. Using ? = .05, is there evidence that the population mean increase in output is greater than 29 units per hour? Do a complete and appropriate hypothesis test.

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