A random sample of n = 30 metal hardness depths has an s2 of .0885 and a

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A random sample of n = 30 metal hardness depths has an s2 of .0885 and a bell-shaped and symmetrical histogram. If σ2 denotes the corresponding population variance, test H0: σ2 = .2209 versus Ha: σ2 < .2209 by setting α equal to .05.
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Essentials Of Business Statistics

ISBN: 9780078020537

5th Edition

Authors: Bruce Bowerman, Richard Connell, Emily Murphree, Burdeane Or

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