Probability and Statistics for Engineering and the Sciences
9th Edition
ISBN: 9781305251809
Author: Jay L. Devore
Publisher: Cengage Learning
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Chapter 7.4, Problem 44E
The amount of lateral expansion (mils) was determined for a sample of n = 9 pulsed-power gas metal are welds used in LNG ship containment tanks. The resulting sample standard deviation was s = 2.81 mils. Assuming normality, derive a 95% CI for σ2 and for σ.
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Probability and Statistics for Engineering and the Sciences
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