Business Statistics: For Contemporary Decision Making, 7th Edition

APPENDIX B

Answers to Selected Odd-Numbered Quantitative Problems

Chapter 1

1.7. a. ratio

• b. ratio
• c. ordinal
• d. nominal
• e. ratio
• f. ratio
• g. nominal
• h. ratio

1.9. a. 900 electric contractors

• b. 35 electric contractors
• c. average score for 35 participants
• d. average score for all 900 electric contractors

Chapter 2

No answers given

Chapter 3

3.1. 4, 4

3.3. 41.7

3.5. 19, 27, 17, 25, 30

3.7. 31.77, 28, 21

3.9. 32250, 286000, 8100, 79962.5, 293000, 842376

3.11. a. 8

• b. 2.041
• c. 6.204
• d. 2.491
• e. 4
• f. 0.69, –0.92, –0.11, 1.89, –1.32, –0.52, 0.29

3.13. a. 4.598

• b. 4.598

3.15. 58, 631.295, 242.139

3.17. a. .75

• b. .84
• c. .609
• d. .902

3.19. a. 2.667

• b. 11.060
• c. 3.326
• d. 5
• e. –0.85
• f. 37.65%

3.21. Between 113 and 137

• Between 101 and 149
• Between 89 and 161

3.23. 2.236

3.25. 95%, 2.5%, .15%, 16%

3.27. 4.64, 3.59, 1

3.29. 185.694, 13.627

3.31. a. 44.9

• b. 39
• c. 44.82
• d. 187.2
• e. 13.7

3.33. a. 38

• b. 25
• c. 32.857
• d. 251
• e. 15.843

3.35. skewed right

3.37. 0.726

3.39. no outliers. negatively skewed

3.41. 2.5, 2, 2, 7, 1, 3, 2

3.43. 472.19, 307.6, 188.6, 338.75, 918.5, 168.5, 469.5, 2130.1, 301

3.45. a. 414422, 417250

• b. 230640, 92580
• c. 5186094518.72, 72014.54
• d. –1.17,0.31
• e. –0.12

3.47. a. 33.412, 32.5

• b. 58.483, 7.647

3.49. 10.78%, 6.43%

3.51. a. 392 to 446, 365 to 473, 338 to 500

• b. 79.7%
• c. –0.704

3.53. skewed right

3.55. 21.93, 18.14

Chapter 4

4.1. 15, .60

4.3. {4, 8, 10, 14, 16, 18, 20, 22, 26, 28, 30}

4.5. 20, combinations, .60

4.7. 38,760

4.9. a. .7167

• b. .5000 ...