Practice and Applications

  1. 7. 76.5

  2. 9. 76.2

  3. 11.

    No. 67–71 71–75 75–79 79–83 83–87
    f 3 4 8 3 2

  4. 13.

    A frequency histogram with symmetry.

  5. 15.

    The bar graph has bars for no high school, high school, 2 year college, and 4 year college that rise to 4, 8, 18, and 10, respectively, on the y-axis.

  6. 17. 0.134 mL/L

  7. 19. 0.014 mL/L

  8. 21. 700 W

  9. 23. 17.3 W

  10. 25. 4.2

  11. 27. 2.0

  12. 29. 95%

  13. 31. 1.8; An IQ of 127 is 1.8 standard deviations above the mean.

  14. 33. p ¯  = 0.0540 ,  UCL  = 0.0843 ,  LCL  = 0.0237

  15. 35.

    A chart where the x-axis is subgroup from 1 to 16, and the y-axis is sample mean in millimeters from 4,900 to 5,100. A line graph rises and falls about y = 5,000 with a low point near (8, 4,900).

  16. 37. 0.9273

  17. 39.  − 1.4 ,  1.4

  18. 41. 65.89%

  19. 43. 99.18%

  20. 45. R = 0.0983T + 25.0

  21. 47. s = 0.123t + 0.887

  22. 49. y = 1.17x + 9.99

  23. 51.

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