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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:26:11                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              253/Zapata                                                VRSN:      P
                                                        253-901/Zapata ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              149,397,056        0.9707           153,906,517               17            5,048
           2           G1           1,565,075,879        1.0023         1,561,484,465               48              816
  RANDOM TOTALS:                    1,714,472,935                       1,715,390,982               65            5,864
  CATG D1 EXCEPTION VALUES:            25,488,789                          25,719,052
 TOTAL TEST VALUES (4):             1,739,961,724                       1,741,110,034
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                87,055,502
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               1,654,054,532 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                1,739,961,724 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               1,828,165,536 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                1,921,882,629 (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