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hw1_solutions

# hw1_solutions - ST 314 1 Text p 52 exercise 2.4 HW#1 1|2...

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ST 314 HW #1 Solutions 1. Text, p. 52, exercise 2.4. Stem-and-Leaf Display for STRENGTH: unit = 0.1 1|2 represents 1.2 1 0|4 3 0|89 12 1|011222344 29 1|56666667777888899 41 2|000112224444 (22) 2|5555666677788888889999 37 3|00001112222223333344 17 3|566777778 8 4|244 5 4|799 2 5|1 HI|5.6 Comments : these appear to be well-behaved data, as they are roughly symmetrical, with a single peak, and have rapidly diminishing tails. They compare quite well to the minimum acceptable breaking stress of 1.2, since only 6 out of the 100 values fall below this standard. 2. Text, p.57, exercise 2.17. If you do this in SG by creating two new columns in the data file called VISC_1 and VISC_2, and then plotting stem-and-leaf displays for each column separately, you end up with the following: Stem-and-Leaf Display for VISC_1: unit = 0.01 1|2 represents 0.12 3 8|388 3 9| 5 10|49 6 11|2 7 12|9 8 13|1 8 14|89 6 15|9 5 16|25 3 17|16 1 18|3 Stem-and-Leaf Display for VISC_2: unit = 0.1 1|2 represents 1.2 2 0|77 4 0|89 4 1| 4 1| (8) 1|44444555 4 1| 4 1| 4 2|011 1 2|3 - 1 -

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SG had taken it upon itself to use different units for the two displays. Thus, they are worthless for comparison purposes.
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hw1_solutions - ST 314 1 Text p 52 exercise 2.4 HW#1 1|2...

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