Chapter_2_Recommended_Homework_Solutions

# Chapter_2_Recommended_Homework_Solutions - Chapter 2...

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Unformatted text preview: Chapter 2 Recommended Homework Solutions 2-1. Sample average: 09 . 56 12 1 . 673 12 12 1 1 = = ∑ = ∑ = = = i i n i i x n x x Sample standard deviation: ( 29 33 . 11 43 . 128 11 70 . 1412 1 12 12 10 . 673 9168 1 39168 10 . 673 2 2 1 1 2 12 1 2 12 1 = = =-- =- ∑- ∑ = ∑ = ∑ = = = = = 3 n n x x s x x n i i n i i i i i i Dot diagram : . . . : .. . . : .-------+---------+---------+---------+---------+---------suspended solids 32.0 40.0 48.0 56.0 64.0 72.0 2-4. Sample average : kN 22 . 126 18 2272 18 18 1 1 = = ∑ = ∑ = = = i i n i i x n x x Sample standard deviation : ( 29 kN 14 . 26 ) ( 24 . 683 17 11 . 11615 1 18 18 2272 298392 1 298392 2272 2 2 2 1 1 2 2 18 1 2 18 1 = = =-- =- ∑- ∑ = ∑ = ∑ = = = = = kN n n x x s x x n i i n i i i i i i Dot Diagram : . : :: . :: . . : . . +---------+---------+---------+---------+---------+-------yield 90 105 120 135 150 165 2-8. The stem and leaf display for weld strength N = 100 Leaf Unit = 1.0Leaf Unit = 1....
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Chapter_2_Recommended_Homework_Solutions - Chapter 2...

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