... Clenna 41. Nathan8. Joan 25. Misty 42. Peggy9. Jim 26. Cindy 43. Heather10. Terrill 27. Sy 44. Debbie11. Susie 28. Phyllis 45. Cheryl12. Nona 29. Jerry 46. Wes13. Doug 30. Harry 47. Genna14. ... (vd. 4 nữ & 6 nam)© 2009 Pearson Prentice Hall, Salkind. Phân tầng theo nhiều tiêu chíGradeLocation 1 3 5 TotalRural1,200[120]1,200[120]600[60]3,000[300]Urban2,800[280]2,800[280]1,400[140]7,000[700]Total4,000[400]4,000[400]2,000[200]10,000[1000]© ... Clenna 41. Nathan8. Joan 25. Misty 42. Peggy9. Jim 26. Cindy 43. Heather10. Terrill 27. Sy 44. Debbie11. Susie 28. Phyllis 45. Cheryl12. Nona 29. Jerry 46. Wes13. Doug 30. Harry 47. Genna14....