. Allowable mechanical properties for structural design ofmetallic aerospace vehicles

Chapter 1, Problem 13

(choose chapter or problem)

. Allowable mechanical properties for structural design ofmetallic aerospace vehicles requires an approved methodfor statistically analyzing empirical test data. The articleEstablishing Mechanical Property Allowables forMetals (J. of Testing and Evaluation, 1998: 293299) usedthe accompanying data on tensile ultimate strength (ksi) asa basis for addressing the difficulties in developing such amethod.122.2 124.2 124.3 125.6 126.3 126.5 126.5 127.2 127.3127.5 127.9 128.6 128.8 129.0 129.2 129.4 129.6 130.2130.4 130.8 131.3 131.4 131.4 131.5 131.6 131.6 131.8131.8 132.3 132.4 132.4 132.5 132.5 132.5 132.5 132.6132.7 132.9 133.0 133.1 133.1 133.1 133.1 133.2 133.2133.2 133.3 133.3 133.5 133.5 133.5 133.8 133.9 134.0134.0 134.0 134.0 134.1 134.2 134.3 134.4 134.4 134.6134.7 134.7 134.7 134.8 134.8 134.8 134.9 134.9 135.2135.2 135.2 135.3 135.3 135.4 135.5 135.5 135.6 135.6135.7 135.8 135.8 135.8 135.8 135.8 135.9 135.9 135.9135.9 136.0 136.0 136.1 136.2 136.2 136.3 136.4 136.4136.6 136.8 136.9 136.9 137.0 137.1 137.2 137.6 137.6137.8 137.8 137.8 137.9 137.9 138.2 138.2 138.3 138.3138.4 138.4 138.4 138.5 138.5 138.6 138.7 138.7 139.0139.1 139.5 139.6 139.8 139.8 140.0 140.0 140.7 140.7140.9 140.9 141.2 141.4 141.5 141.6 142.9 143.4 143.5143.6 143.8 143.8 143.9 144.1 144.5 144.5 147.7 147.7a. Construct a stem-and-leaf display of the data by firstdeleting (truncating) the tenths digit and then repeatingeach stem value five times (once for leaves 1 and2, a second time for leaves 3 and 4, etc.). Why is it relativelyeasy to identify a representative strengthvalue?b. Construct a histogram using equal-width classes with thefirst class having a lower limit of 122 and an upper limitof 124. Then comment on any interesting features of thehistogram.