HW1_2006

HW1_2006 - 2-6 Sample average x= i =1 xi n n = i =1 xi 9 9...

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Unformatted text preview: 2-6. Sample average: x= i =1 xi n n = i =1 xi 9 9 = 19.56 = 2.173 mm 9 Sample standard deviation: i =1 xi = 19.56 n 9 i =1 2 xi = 45.953 2 9 s= x i n i =1 2 xi - i =1 n n -1 = 45.953 - (19.56)2 9 = 3.443 = 0.4304 = 0.6560 mm 8 9 -1 Dot Diagram: . . . . . . . .. -------+---------+---------+---------+---------+--------- Crack length 1.40 1.75 2.10 2.45 2.80 3.15 2-8. The stem and leaf display for weld strength Leaf Unit = 1.0 N = 100 1 532 9 1 533 2 534 2 4 535 47 5 536 6 9 537 5678 20 538 12345778888 26 539 016999 37 540 11166677889 46 541 123666688 (13) 542 0011222357899 41 543 01111556 33 544 00012455678 22 545 233447899 13 546 23569 8 547 357 5 548 11257 2-12. Variable Weld strength N 100 Median 5421.5 Q1 5399.0 Q3 5445.8 5th 5367.05 95th 5476.49 2-20. 15 Frequency 10 5 0 5300 5400 weld strength 5500 100 Cumulative Frequency 50 0 5300 5400 5500 weld strength 30 Frequency 20 10 0 5320 5345 5370 5395 5420 5445 5470 5495 weld strength 100 Cumulative Frequency 50 0 5320 5345 5370 5395 5420 5445 5470 5495 weld strength Yes, both histograms display similar information based on this dataset. 2-29. a) Sample Mean: 8.059, Sample Variance: 0.661 b) Q1: 7.575, Q3: 8.535 c) Sample Median: 8.235 d) 9.5 8.5 rate 7.5 6.5 e) 5th Percentile: 6.759, 95th Percentile: 9.359 ...
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This note was uploaded on 02/27/2008 for the course CHE 405 taught by Professor Shing during the Spring '06 term at USC.

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HW1_2006 - 2-6 Sample average x= i =1 xi n n = i =1 xi 9 9...

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