A sample of ultimate tensile strength observations ksi was taken Use the accompanying descriptive statistics...
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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 153 Mean 131 36 Median 131 37 TrMean 131 38 St Dev 4 59 SE Mean 0 37 Minimum 123 10 Maximum 148 70 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 Q1 132 75 X ksi Q3 139 45
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