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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:22:44                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              228/Trinity                                               VRSN:      P
                                                        228-904/Centerville ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                1,061,602        1.1090               957,261               10               53
           2           A                1,050,568        1.2206               860,698                9               30
           3           A                1,044,886        1.0134             1,031,070                8               18
           4           A                  990,393        1.0729               923,099                9               11
           5           D3               7,131,209        0.9222             7,732,823               23            1,468
           6           G1               1,520,887        1.0869             1,399,289                4                5
  RANDOM TOTALS:                       12,799,545                          12,904,240               63            1,585
  CATG D1 EXCEPTION VALUES:             8,723,237                           7,936,925
  CATG G1 EXCEPTION VALUES:             2,301,633                           1,936,275
 TOTAL TEST VALUES (4):                23,824,415                          22,777,440
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 1,138,872
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  21,638,568 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   23,824,415 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  23,916,312 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   21,208,226 (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