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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:21:20                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      P
                                                        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            1,017,974,426        1.0053         1,012,607,606               50            6,508
           2           A            1,018,091,378        1.0114         1,006,615,956               48            4,469
           3           A            1,016,323,454        1.0149         1,001,402,556               50            3,141
           4           A            1,017,283,382        1.0165         1,000,770,666               50            1,833
           5           B              113,761,871        0.9755           116,619,037               15              816
           6           B              119,842,567        0.9658           124,086,319                5               16
           7           B              139,585,227        0.9748           143,193,708                8                9
           8           F1             424,811,105        0.7476           568,233,153               11              402
           9           F1             427,483,743        0.8453           505,718,376                9              117
          10           F1             440,813,981        0.9478           465,091,771                9               39
          11           L1             613,105,844        0.9711           631,351,914                7              359
          12           L1             610,448,648        1.0032           608,501,443                6               17
  RANDOM TOTALS:                    6,959,525,626                       7,184,192,505              268           17,726
  CATG D1 EXCEPTION VALUES:               129,634                             124,953
  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):             8,625,092,425                       8,857,096,677
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               442,854,834
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               8,414,241,843 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                8,625,092,425 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               9,299,951,511 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                8,268,377,141 (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