mdm12Section2_T_OddSolutionsFinal

mdm12Section2_T_OddSolutionsFinal - Q1-7 Q9-11 CHAPTER 2...

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Unformatted text preview: Q1-7 Q9-11 CHAPTER 2 Chapter Test pp. 154–155 Solutions to Odd Number Problems 1. Score Tally Frequency Score (mid-value) Frequency Interval 44.5-49.5 // 2 47 2 49.5-54.5 / 1 52 1 54.5-59.5 //// 4 57 4 59.5-64.5 //// 5 62 5 64.5-69.5 // 2 67 2 69.5-74.5 /// 3 72 3 74.5-79.5 0 77 0 79.5-84.5 0 82 0 84.5-89.5 0 87 0 89.5-94.5 / 1 92 1 94.5-99.5 // 2 97 2 Cumulative Frequency 2 3 7 12 14 17 17 17 17 18 20 b) frequency diagram and frequency polygon MDM4U Ex am Sc or es MDM4 U Exa m Score s 6 6 5 5 4 4 3 Fr equenc y 3 2 2 1 1 0 40 50 60 70 80 90 100 0 -1 40 50 60 70 80 90 10 0 Fr equenc y c) cumulative-frequency diagram MDM4U Ex am Sc ore Cumulative Frequenc y 25 20 15 Cumulative Frequenc y 10 5 0 50 60 70 80 90 100 3. a) b) outliers: 92, 97, 98 c) There is no right whisker, so all the data above Q3 are outliers. 5. a) Since there are 20 students, there are two students above the 90th percentile. b) The scores are 97 and 98. 7. a) stratified sample b) cluster sample c) voluntary-response sample d) simple random sample e) convenience sample Top 9. a) i) Measurement bias; loaded question may invite negative responses. ii) Response bias; audience members may not wish to admit making a late bill payment. iii) Sampling bias; sample includes only business executives who are more likely to favour the channel. b) i) Reword the question and omit the references to “run around” and “get into trouble.” ii) Require the audience members to respond anonymously. iii) A sample of the relevant population should be selected randomly. 11. Solutions for the Achievement Checks are in the Teacher Resource. Top ...
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This note was uploaded on 01/23/2012 for the course MATHS MDM-01 taught by Professor Mr.m during the Spring '10 term at Seneca.

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mdm12Section2_T_OddSolutionsFinal - Q1-7 Q9-11 CHAPTER 2...

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