A study of the fracture toughness of nod
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Xi-Juan Li; Guang-Ming Lin; Wen-Guang Zhen; Li-Yun Wang
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Article
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1982
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Elsevier Science
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English
β 89 KB
## Chinese abstract5 population mean with confidence level y (say, 90%). The acceptable percent error 6 is usually S%. It is obvious from the above-mentioned expression that if one wants to find the sample size n, he will have to follow a trial-and-error procedure. By referring to some test data