Homework 1 Solutions 2028 Fall 2010

# Homework 1 Solutions 2028 Fall 2010 - Homework 1 Solutions...

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Homework 1 Solutions 6-8. Sample average: min 359 . 14 19 82 . 272 19 19 1 i i x x Sample variance: Sample standard deviation: min 88 . 18 47 . 356 s The sample standard deviation could also be found using where

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6-18. sample mean 11 . 83 9 0 . 748 1 n x x n i i drag counts sample variance 2 2 2 1 1 2 2 counts drag 61 . 50 8 89 . 404 1 9 9 0 . 748 62572 1 n n x x s n i i n i i sample standard deviation 11 . 7 61 . 50 s drag counts Dot Diagram . . . . . . . . . ---+---------+---------+---------+---------+---------+---drag counts 75.0 80.0 85.0 90.0 95.0 100.0 6-23. Stem-and-leaf display for cycles to failure: unit = 100 1|2 represents 1200 1 0T|3 1 0F| 5 0S|7777 10 0o|88899 22 1*|000000011111 33 1T|22222223333 (15) 1F|444445555555555 22 1S|66667777777 11 1o|888899 5 2*|011 2 2T|22 Median = 1436.5, Q 1 = 1097.8, and Q 3 = 1735.0 No, only 5 out of 70 coupons survived beyond 2000 cycles. 6-30. sample mean: 65.811 x inches, standard deviation 2.106 s inches, and sample median: 66.000 ~ x
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Homework 1 Solutions 2028 Fall 2010 - Homework 1 Solutions...

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