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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:21:45                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      W
                                                        220-906/Grapevine-Colleyville ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A            1,018,488,936        1.0053         1,013,119,403               50            6,508
           2           A            1,018,605,947        1.0114         1,007,124,725               48            4,469
           3           A            1,016,837,129        1.0149         1,001,908,690               50            3,141
           4           A            1,017,797,542        1.0165         1,001,276,480               50            1,833
           5           B              111,833,541        0.9755           114,642,277               15              816
           6           B              117,811,166        0.9658           121,982,984                5               16
           7           B              137,219,177        0.9748           140,766,493                8                9
           8           F1             424,331,655        0.7476           567,591,834               11              402
           9           F1             427,001,276        0.8453           505,147,611                9              117
          10           F1             440,316,470        0.9478           464,566,860                9               39
          11           L1             606,320,865        0.9711           624,365,014                7              359
          12           L1             603,693,076        1.0032           601,767,420                6               17
  RANDOM TOTALS:                    6,940,256,780                       7,164,259,791              268           17,726
  CATG D1 EXCEPTION VALUES:               123,198                             120,076
  CATG B  EXCEPTION VALUES:            72,704,033                          71,958,000
  CATG F1 EXCEPTION VALUES:           456,043,137                         478,127,584
  CATG L1 EXCEPTION VALUES:         1,136,689,995                       1,122,693,635
 TOTAL TEST VALUES (4):             8,605,817,143                       8,837,159,086
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               441,857,954
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               8,395,301,132 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                8,605,817,143 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               9,279,017,040 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                8,227,863,134 (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