Chapter 02 - 2 Chapter 2 2.1 Nominal: Occupation,...

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2 Chapter 2 2.1 Nominal: Occupation, undergraduate major. Ordinal: Rating of university professor, Taste test ratings. Interval: age, income 2.2 a Interval b Interval c Nominal d Ordinal 2.3 a Interval b Nominal c Ordinal d Interval e Interval 2.4 a Nominal b Interval c Nominal d Interval e Ordinal 2.5 a Interval b Interval c Nominal d Interval e Nominal83 2.6 a Interval b Interval c Nominal d Ordinal e Interval 3 2.7 a Interval b Nominal c. Nominal d Interval e Ordinal 2.8 a Interval b Ordinal c Nominal d Ordinal 2.9 a Interval b Nominal c Nominal 2.10 a Ordinal b Ordinal c Ordinal 2.11 9 or 10 2.12 10 or 11 2.13 a 7 to 9 b Interval width 9 . 18 8 37 188 = - » (rounded to 20); upper limits: 40, 60, 80,100,120, 140, 160 180, 200 2.14 a 7 to 9 b Interval width 13 . 7 2 . 5 1 . 6 = - » (rounded to .15); upper limits: 5.25, 5.40, 5.55, 5.70, 5.85, 6.00, 6.15
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4 2.15a 0 5 10 15 5 10 15 20 25 Defectives Frequency b 0 1 0 5 10 15 20 25 Defectives Frequency c The histogram is unimodal and somewhat positively skewed. 2.16 a Histogram 0 5 10 4 6 8 10 12 Pages Frequency b Ogive 0 1 0 3 6 9 12 Pages Frequency 5 2.17 a b Histogram 0 10 20 30 36 42 48 54 60 66 Ages Frequency c Ogive 0 1 24 30 36 42 48 54 60 66 Ages Frequency 2.18 Histogram 0 10 20 5 10 15 20 25 Calls Frequency Stem & Leaf Display Stems Leaves
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2 ->566889 3 ->01233345566778899 4 ->00111166689 5 ->00123 6 ->1 6 2.19 a b Histogram 0 20 40 31 32 33 34 35 36 37 38 Times Frequency 2.20 a Histogram 0 20 40 1 2.5 4 5.5 7 8.5 10 Stores Frequency b Ogive 0 1 0 1.5 3 4.5 6 7.5 9 Stores Frequency Stem & Leaf Display Stems Leaves 30 ->0112222222356667777788 31 ->001113568 32 ->024777 33 ->0047 34 ->024455 35 ->7 36 ->7 37 ->9 7 2.21 Histogram 0 10 20 8 12 16 20 24 28 Games Frequency 2.22 a Histogram 0 10 20 5 10 15 20 25 30 35 40 45 Rounds Frequency
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b Stem & Leaf Display Stems Leaves 0 ->359 1 ->0023334445556677888888899 2 ->00001223334444455566667888889999 3 ->00000112556668 4 ->2 c Ogive 0 1 0 5 10 15 20 25 30 35 40 Rounds Frequency 8 2.23 Histogram 0 50 100 44000 52000 60000 68000 76000 Salaries Frequency 2.24 a The number of bins should be 7, 8, or 9. We chose 7. b Histogram 0 20 40 200 225 250 275 300 325 350 Prices Frequency c The histogram is positively skewed, unimodal, and not bell-shaped. d We learn that most prices lie between 200 and 275 thousand dollars with a small number of houses selling for more than $275,000. 2.24 a Histogram 0 20 40 200 225 250 275 300 325 350 Prices Frequency b 9 Ogive 0 1 200 225 250 275 300 325 350 More Prices Frequency c Stem & Leaf Display Stems Leaves 19 ->258
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20 ->025668899999 21 ->01233457789 22 ->0012222223346699 23 ->00336 24 ->012244467788 25 ->00002255 26 ->0569 27 ->00235689 28 ->69 29 30 ->68 31 32 33 34 ->01 d We learn that most prices lie between 200 and 275 thousand dollars with a small number of houses selling for more than $275,000. 2.25
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This note was uploaded on 06/06/2011 for the course ADMS 2320 taught by Professor Rochon during the Spring '08 term at York University.

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Chapter 02 - 2 Chapter 2 2.1 Nominal: Occupation,...

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