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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:22:47                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              226/Tom Green                                             VRSN:      W
                                                        226-907/Grape Creek ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               18,915,168        1.0085            18,755,744               30              658
           2           A               18,719,150        0.9949            18,815,107               15              381
           3           A               18,826,562        0.9880            19,055,225               15              288
           4           A               18,765,331        0.9981            18,801,053               28              189
           5           D3               8,113,102        0.9196             8,822,425               10            1,075
  RANDOM TOTALS:                       83,339,313                          84,249,554               98            2,591
  CATG D1 EXCEPTION VALUES:             5,365,900                           4,860,162
 TOTAL TEST VALUES (4):                88,705,213                          89,109,716
 MARGIN OF ERROR PERCENT:               5.0000002
 MARGIN OF ERROR VALUE:                 4,455,486
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  84,654,230 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   88,705,213 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  93,565,202 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   98,509,883 (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