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Question 18
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The production manager at a textile mill, believes that a new machine, producing cloth, is not working according to the companys specifications The company requires that the cloth should have a mean breaking strength of 45 Kg. A sample of 99 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 do a hypothesis test to her belief, what value of the mea would be used in the null and the alternative hypotheses?
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