A manufacturing process produces machine parts with measurements the standard deviation of which must be no more than 0.52 mm. A random sample of 20 parts in a given lot revealed a standard deviation in measurement of 0.568 Is there sufficient evidence at α = 0.05 to conclude that the standard deviation of the parts is outside the required guidelines? Apply the following statistical testing methods to justify your answer. i. Traditional method     ii.       P-value method

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