Consider the accompanying observations on bond strength. 11.4 13.2 0.145 4.8 3.8 8.1 5.1 12.0 9.8 x 16.9 9.1 I 10.9 15.0 3.6 5.0 20.8 9.2 4.3 0.396 5.5 10.6 14.1 7.5 8.4 25.3 3.7 7.6 5.5 4.0 13.6 5.3 3.6 6.4 6.603 5.3 3.9 12.7 5.4 3.7 6.4 5.0 3.8 4.0 2 (a) Estimate true average bond strength in a way that conveys information about precision and reliability. [Hint: x = 384.5 and x = 4,183.61.] (Round your answers to three decimal places.) A 95% CI for = the true average strength is 13.0 8.7 3.5 6.8 4.9 4.8 5.0 A -- 1 3.5 (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.) x ) 9.417 x ). Masa AME

Consider the accompanying observations on bond strength. (a) Estimate true average bond strength in a way that conveys intormation about precision and reliability. [thint: xi=384.5 and xi2=4,183.61.] (Round your answers to three docimal places.) A 95% Cl for = 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.)