The tensile strength of fiber used in manufacturing cloth is of interest to the purchaser. Previous experience
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The tensile strength of fiber used in manufacturing cloth is of interest to the purchaser. Previous experience indicates that the standard deviation of tensile strength is 2 psi. A random sample of eight fiber specimens is selected, and the average tensile strength is found to be 127 psi.
a. Build a 95% lower confidence interval in the mean tensile strength.
b. What can you conclude?
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Related Book For
Managing Controlling and Improving Quality
ISBN: 978-0471697916
1st edition
Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund
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