Mathematics, 08.02.2021 19:20 caity2006
Allowable mechanical properties for structural design of metallic aerospace vehicles requires an approved method for statistically analyzing empirical test data. The accompanying data on tensile ultimate strength (ksi) is used as a basis for addressing the difficulties in developing such a method.
122.2 124.2 124.3 125.6 126.3 126.5 126.5 127.2 127.3
127.5 127.9 128.6 128.8 129.0 129.2 129.4 129.6 130.2
130.4 130.8 131.3 131.4 131.4 131.5 131.6 131.6 131.8
131.8 132.3 132.4 132.4 132.5 132.5 132.5 132.5 132.6
132.7 132.9 133.0 133.1 133.1 133.1 133.1 133.2 133.2
133.2 133.3 133.3 133.5 133.5 133.5 133.8 133.9 134.0
134.0 134.0 134.0 134.1 134.2 134.3 134.4 134.4 134.6
134.7 134.7 134.7 134.8 134.8 134.8 134.9 134.9 135.2
135.2 135.2 135.3 135.3 135.4 135.5 135.5 135.6 135.6
135.7 135.8 135.8 135.8 135.8 135.8 135.9 135.9 135.9
135.9 136.0 136.0 136.1 136.2 136.2 136.3 136.4 136.4
136.6 136.8 136.9 136.9 137.0 137.1 137.2 137.6 137.6
137.8 137.8 137.8 137.9 137.9 138.2 138.2 138.3 138.3
138.4 138.4 138.4 138.5 138.5 138.6 138.7 138.7 139.0
139.1 139.5 139.6 139.8 139.8 140.0 140.0 140.7 140.7
140.9 140.9 141.2 141.4 141.5 141.6 142.9 143.4 143.5
143.6 143.8 143.8 143.9 144.1 144.5 144.5 147.7 147.7
(a) Construct a stem-and-leaf display of the data by first deleting (truncating) the tenths digit and then repeating each stem value five times (once for leaves 1 and 2, a second time for leaves 3 and 4,
etc.). Why is it relatively easy to identify a representative strength value?
(b) Construct a histogram using equal-width classes with the first class having a lower limit of 122 and an upper limit of 124. Then comment on any interesting features of the histogram.
Answers: 2
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Allowable mechanical properties for structural design of metallic aerospace vehicles requires an app...
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