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(b) A factory produces tables which are claimed on average to have a length of 150.0 cm. Assume the standard deviation is known to be

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(b) A factory produces tables which are claimed on average to have a length of 150.0 cm. Assume the standard deviation is known to be o = 0.6 cm, and that the length of tables is normally distributed. The factory's manager wants to carry out a test of: Ho : / = 150.0 vs. H, : /

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