Solutions — Exercises II / 4.3
  1.  
    1. 0.3925
    2. 0.4861
    1. 0.3085
    2. 0.6915
  2.  
    1. 0.5759
    2. 0.2029
    1. 0.0957
    2. 0.0475
  3. Approx. 20%   (0.2033)

  4. Approx. 10.56%

  5. a.   Approx. 5½%
    b.   Approx. 35%

  6. Approx. 67%

  7. Approx. 32%

  8. a.   25,000
    b.   Approx. 49,690
    c.   Approx. 310
    d.   Approx. 24,690
    e.   Approx. 39,440

  9. Approx. 77 people

  10. Approx. 12 cars

  11. 68.4

  12. a.   88 (i.e., above 87.4)               b.   64 (i.e., above 63.9)

  13. Approx.  1865 lb - 2135 lb

  14. a.   50%
    b.   Approx. 22%   (0.2206)
    c.   Approx. 23%   (0.2269)
    d.   A:  81.4 - 100    (i.e., 82+)
          B:  70.9 - 81.4   (i.e., 71-81)
          C:  49.1 - 70.9   (i.e., 50-70)
          D:  38.6 - 49.1   (i.e., 39-49)
          F:  0 - 38.6        (i.e., 0-38)

  15. a.   Approx. 31%   (0.3085)
    b.   Approx. 31%   (0.3085)
    c.   Approx. 34%   (0.3413)
    d.   A:  81.4 - 100    (i.e., 82+)
          B:  73.4 - 81.4   (i.e., 74-81)
          C:  56.6 - 73.4   (i.e., 57-73)
          D:  48.6 - 56.6   (i.e., 49-56)
          F:  0 - 48.6        (i.e., 0-48)