Page 782 - Basic College Mathematics with Early Integers

A14 ANSWERS TO SELECTED EXERCISES

1 1 1 2 1 2 1 2 4 19 1 5 1 20 2 1 1
11. 13. 15. 17. 19. 21. 1 23. 25. 27. 29. 31. 33. 35. 37. 39. or 6 41. 43.
6 3 2 3 3 3 7 7 7 100 20 6 6 3 3 52 13
1 1 5
45. 47. 49. 51. 0 53. answers may vary
4 2 36
Answers to Selected Exercises
Chapter 7 Vocabulary Check 1. bar 2. mean 3. outcomes 4. pictograph 5. mode 6. line 7. median 8. tree diagram 9. experiment
10. circle 11. probability 12. histogram; class interval; class frequency
Chapter 7 Review 1. 1,500,000 2. 2,000,000 3. South 4. Midwest 5. South 6. Northeast, Midwest,West 7. 11% 8. 2008
9. 1990, 2000, 2008 10. answers may vary 11. 960 12. 920 13. 930 14. 815 15. 25 16. 145 17. 1 employee 18. 4 employees
19. 18 employees 20. 9 employees 21. ||||; 5 22. |||; 3 23. ||||; 4 24. 25. mortgage payment 26. utilities
Number of months 5 4 3 2 1

80–89 90–99 100–109

Temperatures
39 7
27. $1225 28. $700 29. 30. 31. 38 32. 18 33. 1 34. 4 35. mean: 17.8; median: 14; no mode 36. mean: 58.1; median: 60; mode: 45
160 40
and 86 37. mean: 24,500; median: 20,000; mode: 20,000 38. mean: 447.3; median: 420; mode: 400 39. 3.25 40. 2.57
41. Outcomes 42. Outcomes 43. Outcomes 44. Outcomes
1 H, 1 H Red, H 1 1, 1 Red Red, Red
2 H, 2 Red 2 1, 2 Red
H 3 H, 3 T Red, T 1 3 1, 3 Blue Red, Blue
4 H, 4 4 1, 4
5 H, 5 H Blue, H 5 1, 5 Red Blue, Red
Blue Blue
1 T, 1 T Blue, T 1 2 2, 1 Blue Blue, Blue
2, 2
2 T, 2 4 outcomes
T 3 T, 3 4 outcomes 2 3 4 2, 3
2, 4
4 T, 4 5 2, 5
5 T, 5
1 3, 1
10 outcomes
2 3, 2
3 3 3, 3
45. Outcomes 4 3, 4
5 3, 5
Red 1, Red
1 1 4, 1
Blue 1, Blue 2 4, 2
4 3 4, 3
Red 2, Red 4 4, 4
2
Blue 2, Blue 5 4, 5
1 5, 1
Red 3, Red 2 5, 2
3
Blue 3, Blue 5 3 5, 3
4 5, 4
Red 4, Red 5 5, 5
4
Blue 4, Blue 25 outcomes
Red 5, Red
5
Blue 5, Blue
10 outcomes
1 1 1 1 3 2 1 1
46. 47. 48. 49. 50. 51. 52. 53. 54. mean: 74.4; median: 73; mode: none 55. mean: 48.8; median: 32; mode: none
6 6 5 5 5 5 2 2
1 3 1 1
56. mean: 454; median: 463.5; mode: 500 57. mean: 619.17; median: 647.5; mode: 327 58. 59. 60. 61.
4 8 4 8
Chapter 7 Test 1. $225 2. 3rd week; $350 3. $1100 4. June,August, September 5. February; 3 cm 6. March and November
7. Most Common Blood Types 8. 2.25% 9. 2000, 2005, 2006, 2008 10. 1998–1999, 1999–2000, 2002–2003, 2003–2004, 2004–2005,
by Percent in the Population
40 17 31
2007–2008 11. 40 12. 22 13. 6,211,500 people 14. 18,937,500 people 15. 9 students
30
Percent of Population 20 16. 11 students 17. Class Interval Tally (Number of Students) 18. 8 6
Class Frequency
10
(Scores)
40–49 | 1 Number of Students 4
O A B O A AB B AB 2
Blood Types 50–59 | | | 3
40–49 50–59 60–69 70–79 80–89 90–99
60–69 | | | | 4
Scores
70–79 | | | | 5
80–89 | | | | ||| 8 Copyright 2012 Pearson Education, Inc.
90–99 | | | | 4
19. mean: 38.4; median: 42; no mode 20. mean: 12.625; median: 12.5; mode: 12 and 16 21. 3.07