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A human resources administrator at an engineering firm administers an employee satisfaction instrument to a sample of 50 employees. He obtains means of91.5 from 18 engineers, 83.0 from 12 technicians. and 74.6 from 20 administrative support staff. What are the effects (ai ) for each type of employee, using the weighted sample mean as an estimate of the population mean?

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Category:- Computer Engineering
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