# Consider the accompanying observations on bond strength. 11.7 12.3 9.8 9.2 7.7 6.4 6.7 6.8 13.2…

Consider the accompanying observations on bond strength. 11.7 12.3 9.8 9.2 7.7 6.4 6.7 6.8 13.2 17.2 9.2 5.7 5.5 5.3 5.4 5.0 4.7 10.6 15.3 8.7 4.3 4.1 3.8 4.0 3.5 3.6 20.4 25.4 13.7 12.7 13.3 9.0 8.3 10.8 14.3 7.4 5.1 5.6 5.2 4.9 5.3 5.0 3.9 3.9 3.5 3.8 3.5 3.8 (a) Estimate true average bond strength in a way that conveys information about precision and reliability. [Hint: < x; = 388.5 and ____ x2 = 4,253.41.] (Round your answers to three decimal places.) A 95% CI for u = the true average strength is (b) Calculate a 95% CI for the proportion of all such bonds whose strength values would exceed 10. (Round your answers to three decimal places.)

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