mdm12Section2_5_OddSolutionsFinal

# mdm12Section2_5_OddSolutionsFinal - Q1-7 Q13-15 Q9-11...

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Q1-7 Q9-11 Q13-15 CHAPTER 2 Section 2.5 pp. 133–135 Solutions to Odd Number Problems 1. a) Arrange the data in ascending order: 1.2, 1.6, 1.7, 1.9, 2.2, 2.4, 2.4, 2.4, 2.7, 3.0, 3.1, 3.3, 3.5, 3.5, 3.8 mean: 2.58 median: 2.4 mode: 2.4 b) Arrange the data in ascending order: 9, 10, 10, 11, 12, 14, 14, 14, 15, 15, 17, 18, 18, 18, 19, 20 mean: 14.6 median: 14.5 bimodal: 14, 18 3. () 87 0.7 71 0.3 82% ×+×= 5. Nadia's score: 2(4 + 4) + 4 = 20 Enzo's score: 2(5 + 4) + 3 = 21 Stephan's score: 2(5 + 3) + 4 = 20 Enzo received the highest score. He should get the job. 7. a) ()() () ( ) 82 0.35 71 0.25 85 0.15 75 0.25 78% +++= b) () () 78 0.7 65 0.3 74% += Top

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9. Arrange the data in ascending order. 4, 4, 5, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11 a) mean: 8 median:7.5 mode: 7 b) The mode has the greatest significance. This indicates that Al should stock more size 7 due to the highest demand from the customers. c) The 2nd highest demand is size 10. d) The two peaks in the histogram are the mode, size 7, and the 2nd highest demand, size 10. 11. Salary Range (\$000) Middle Value, x (\$000) Number of Employees, f Fx (\$000) 20-29 25 12 300 30-39 35 24 840 40-49 45 32 1440 50-59 55 19 1045 60-69 65 9 585 70-79 75 3 225 80-89 85 0 0 90-100 95 1 95 Sum 100 4530 a)
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mdm12Section2_5_OddSolutionsFinal - Q1-7 Q13-15 Q9-11...

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