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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:21:39                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      W
                                                        220-902/Birdville ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              899,837,174        1.0363           868,317,258               50           11,086
           2           A              898,554,301        1.0254           876,296,373               50            8,491
           3           A              900,770,831        1.0077           893,887,894               51            6,502
           4           A              897,242,626        1.0159           883,199,750               46            4,613
           5           B              102,459,930        0.9722           105,389,765               21              551
           6           B              101,591,740        0.9691           104,831,018                7               21
           7           B              109,447,715        0.9704           112,786,186                6               13
           8           B               90,830,921        1.0606            85,641,072                3                5
           9           F1             313,765,403        0.8655           362,525,018               12              827
          10           F1             313,026,436        0.8884           352,348,532               10              220
          11           F1             318,185,418        0.8852           359,450,314               12               76
          12           F1             307,972,876        0.9094           338,655,021                5               19
          13           L1             160,232,116        1.0100           158,645,659                7            1,170
          14           L1             160,934,195        1.0040           160,293,023                8              241
          15           L1             161,098,035        1.0458           154,042,871                7               67
          16           L1             158,356,158        0.9805           161,505,516                7               17
  RANDOM TOTALS:                    5,894,305,875                       5,977,815,270              302           33,919
  CATG D1 EXCEPTION VALUES:                49,721                              44,199
 TOTAL TEST VALUES (4):             5,894,355,596                       5,977,859,469
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               298,892,973
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               5,678,966,496 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                5,894,355,596 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               6,276,752,442 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                5,952,060,752 (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