The article Development of Novel Industrial Laminated Planks from Sweetgum Lumber (J. Bridge Engr. 2008: 6466) provides
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The article “Development of Novel Industrial Laminated Planks from Sweetgum Lumber” (J. Bridge Engr. 2008: 64–66) provides the following data on the modulus of rupture (psi) for a sample of planks:
a. Perform a hypothesis test at the .01 level to determine if the true modulus of rupture for this type of plank differs from 7500 psi.
b. A 99% confidence interval for μ is (6929.7, 7476.7); this was calculate using the one-sample t interval. Explain how the results of your hypothesis test in part (a) are consistent with this confidence interval.
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Related Book For 
Modern Mathematical Statistics With Applications
ISBN: 9783030551551
3rd Edition
Authors: Jay L. Devore, Kenneth N. Berk, Matthew A. Carlton
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