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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:07:24                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              109/Hill                                                  VRSN:      P
                                                        109-912/Aquilla ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                1,854,976        0.9505             1,951,579                7               80
           2           A                1,910,674        0.9584             1,993,608                8               43
           3           A                1,848,841        0.9998             1,849,211                6               26
           4           A                1,840,101        1.0893             1,689,251                7               14
           5           D3              22,283,270        0.9151            24,350,639               21            1,200
  RANDOM TOTALS:                       29,737,862                          31,834,288               49            1,363
  CATG J  EXCEPTION VALUES:             1,136,865                           1,167,535
  CATG D1 EXCEPTION VALUES:             4,470,680                           3,890,210
 TOTAL TEST VALUES (4):                35,345,407                          36,892,033
 MARGIN OF ERROR PERCENT:               5.5355936
 MARGIN OF ERROR VALUE:                 2,042,193
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  34,849,840 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   35,345,407 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  38,934,226 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   34,737,942 (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