A sample of ultimate tensile strength observations (ksi) was taken. Use the accompanying descriptive statistics output from Minitab to calculate a 99% lower confidence bound for true average ultimat tensile strength, and interpret the result. (Round your answer to two decimal places.) N Mean 153 131.36 Median 131.37 TrMean 131.38 StDev 4.59 SE Mean. 0.37 Minimum 123.10 Maximum Q1 Q3 148.70 132.75 139.45 X ksi. We are 99% confident that the true average ultimate tensile strength is greater than 131.28 You may need to use the appropriate table in the Appendix of Tables to answer this question.