# Question: Table 3E 4 contains 20 observations on cycles to failure of

Table 3E.4 contains 20 observations on cycles to failure of aluminum test coupons subjected to repeated alternating stress of 15,000 psi at 20 cycles per second. Construct a normal probability plot, a lognormal probability plot, and a Weibull probability plot for these data. Based on the plots, which distribution seems to be the best model for the cycles to failure for this material?

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