Question text

The production manager at a textile mill, believes that a new machine, producing cloth, is not workingaccording to the company's specifications.The company requires that the cloth should have a mean breaking strength of 9 Kg.A sample of 78 pieces of cloth reveals a sample mean breaking strength of 14.1 Kg and a standard deviation of 0.7 Kg. The manager wants to do a hypothesis test of the mean.What value of the mean would be used in the null and alternative hypotheses?