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mdm12Section3_P_OddSolutionsFinal

mdm12Section3_P_OddSolutionsFinal - = 1.5 – 0.5 0.5 1.5...

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Q1 Q3-7 Q9 CHAPTER 3 Review of Prerequisite Skills, p. 158 Solutions to Odd Number Problems 1. a) strong negative correlation b) weak positive correlation Top
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3. a) y = 3 x – 4 b) y = –2 x + 6 c) 12 x –6 y = 7, i.e., y = 7 2 6 x slope = 3 slope = –2 slope = 2 y -intercept = –4 y -intercept = 6 y -intercept = – 7 6 5. a) i) base = 3, coefficient = 0.5 ii) base = 2, coefficient = 1 iii) base 0.5, coefficient = 100 b) i) ii) iii) c) i) x approaches a large negative value when the curve approaches the x -axis. ii) x approaches a large negative value when the curve approaches the x -axis. iii) x approaches a large positive value when the curve approaches the x -axis. 7. a) (1 – 2.5) + (2 – 2.5) + (3 – 2.5) + (4 – 2.5) + (5 – 2.5) + (6 – 2.5)
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Unformatted text preview: = - 1.5 – 0.5 + 0.5 + 1.5 + 2.5 + 3.5 = 6 b) (1 – 2.5) 2 + (2 – 2.5) 2 + (3 – 2.5) 2 + (4 – 2.5) 2 = 2.25 + 0.25 + 0.25 + 2.25 = 5 Top 9. a) Simple random sample: every member of the population has an equal chance of being selected and the selection of any particular individual does not affect the chances of any other individual being chosen. b) Systematic sample: scan the population sequentially and select members at regular intervals. The sampling interval size is determined by dividing the population size by the sample size. c) Outlier: a data point or observation that lies a long way from the main body of data. Top...
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mdm12Section3_P_OddSolutionsFinal - = 1.5 – 0.5 0.5 1.5...

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