Over a long period of time, the lengths of engineering components of a certain type have found
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Question:
Over a long period of time, the lengths of engineering components of a certain type have found to be normally distributed with mean of 20.0 cm and standard deviation of 0.9 cm. A sample of 225 components has a mean length of 20.2 cm. Determine whether or not these figures suggest that a change in the manufacturing process has taken place. Test at 5% level of significance.
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Leadership Research Findings, Practice and Skills
ISBN: 978-1285866369
8th edition
Authors: Andrew J. Dubrin
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