Lecture 27

# Lecture 27 - Simple Statistics Measurement of the...

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Unformatted text preview: Simple Statistics Measurement of the coefficient of thermal expansion of structural steel [ 10- 6 in/(in F)] 535 6 667 6 670 6 592 6 633 6 627 6 598 6 499 6 621 6 445 6 451 6 403 6 703 6 542 6 659 6 624 6 733 6 662 6 721 6 396 6 564 6 435 6 625 6 555 6 655 6 478 6 621 6 543 6 399 6 552 6 667 6 325 6 495 6 775 6 554 6 485 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mean, standard deviation, variance, etc. Statistics Review Arithmetic mean Standard deviation about the mean Variance (spread) Coefficient of variation (c.v.) ( 29 2 i t t y y y S 1 n S s - =- = ; ( 29 ( 29 1 n n y y 1 n y y s 2 i 2 i 2 i 2 y-- =-- = / % . . 100 y s v c y = 1 6.485 0.007173 42.055 2 6.554 0.000246 42.955 3 6.775 0.042150 45.901 4 6.495 0.005579 42.185 5 6.325 0.059875 40.006 6 6.667 0.009468 44.449 7 6.552 0.000313 42.929 8 6.399 0.029137 40.947 9 6.543 0.000713 42.811 10 6.621 0.002632 43.838 11 6.478 0.008408 41.964 12 6.655 0.007277 44.289 13 6.555 0.000216 42.968 14 6.625 0.003059 43.891 15 6.435 0.018143 41.409 16 6.564 0.000032 43.086 17 6.396 0.030170 40.909 18 6.721 0.022893 45.172 19 6.662 0.008520 44.382 20 6.733 0.026669 45.333 21 6.624 0.002949 43.877 22 6.659 0.007975 0....
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## Lecture 27 - Simple Statistics Measurement of the...

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