Repeat Prob. 20–25, presuming the distribution is lognormal. What is the yield strength exceeded by 99 percent of the population? Compare the normal fit of Prob. 20–25 with the lognormal fit by superposing the PDFs and the histographic PDF
Answer to relevant QuestionsA 1046 steel, water-quenched and tempered for 2 h at 1210°F, has a mean tensile strength of 105 kpsi and a yield mean strength of 82 kpsi. Test data from endurance strength testing at 104-cycle life give (S′fe) 104 = ...A cold-drawn 301SS stainless steel has an ultimate tensile strength given by Sut = W [151.9, 193.6, 8.00] kpsi. Find the mean and standard deviation.A 60-45-15 nodular iron has a 0.2 percent yield strength Sy with a mean of 49.0 kpsi, a standard deviation of 4.2 kpsi, and a guaranteed yield strength of 33.8 kpsi. What are the Weibull parameters θ and b?Use the true values x1 = √5 and x2 = √6 (a) Demonstrate the correctness of the error equation from Prob. 17 for addition if three correct digits are used for X1 and X2. (b) Demonstrate the correctness of the ...Assuming you were specifying an AISI 1040 steel for an application where you desired to maximize the yield strength, how would you specify it?
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