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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:21:47                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      W
                                                        220-907/Keller ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A            1,277,748,401        1.0251         1,246,462,200               48           10,360
           2           A            1,274,845,884        1.0128         1,258,734,088               51            7,212
           3           A            1,274,291,898        1.0146         1,255,954,956               49            5,292
           4           A            1,275,120,029        1.0151         1,256,152,132               48            3,358
           5           F1             151,488,046        0.9149           165,578,802                8              203
           6           F1             151,943,916        0.8795           172,761,701                6               60
           7           F1             154,242,734        0.9340           165,142,113                5               18
  RANDOM TOTALS:                    5,559,680,908                       5,520,785,992              215           26,503
  CATG D1 EXCEPTION VALUES:               582,470                             532,374
  CATG F1 EXCEPTION VALUES:           126,385,394                         131,548,416
 TOTAL TEST VALUES (4):             5,686,648,772                       5,652,866,782
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               282,643,339
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               5,370,223,443 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                5,686,648,772 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               5,935,510,121 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                6,587,206,238 (SEE ISD SUMMARY WORKSHEET)

 SOURCES:
 (1) SEE STRATIFIED CATEGORY WORKSHEET REPORTS PTS236, PTS430
 (2) NUMBER OF PARCELS SAMPLED BY STAFF
 (3) TOTAL CATEGORY PARCELS FROM STRATIFICATION REPORT APPRAISAL ROLL, OR SELF-REPORT
 (4) INCLUDES ANY PARCELS IN A, B, C, D3, F1, G1, G2,OR L1 MARKED AS EXCEPTION PROPERTIES
 (5) UNSTUDIED CATEGORIES AND SUB-CATEGORIES WERE NOT INCLUDED IN THE CONFIDENCE INTERVAL VALUES