The production manager at a textile mill, believes that a new machine, producing cloth, is not working according to the company's specifications. The company requires that the cloth should have a mean breaking strength of 52 Kg. A sample of 63 pieces of cloth reveals a sample mean breaking strength of 40.8 Kg and a standard deviation of 2.8 Kg. If the manager wants to complete hypothesis test to her belief, what value of the mean would be used in the null and the alternative hypotheses?

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