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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:55:23                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              031/Cameron                                               VRSN:      P
                                                        031-909/Point Isabel ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              356,160,786        0.9327           381,859,961               57            3,561
           2           A              355,788,674        0.9300           382,568,467               53            1,747
           3           A              356,108,446        0.9600           370,946,298               56            1,199
           4           A              355,175,350        0.9966           356,387,066               61              687
           5           C               43,965,740        0.9119            48,213,335                7            1,225
           6           C               39,757,565        0.8860            44,873,098               11              613
           7           C               41,890,142        0.9312            44,985,118                7              278
           8           C               41,797,998        0.9760            42,825,818                7               82
           9           F1              48,396,802        0.9755            49,612,303                7              224
          10           F1              48,102,309        0.9602            50,096,135                7               74
          11           F1              48,487,967        1.0276            47,185,643                6               35
          12           F1              48,164,763        0.9333            51,606,946                5                9
  RANDOM TOTALS:                    1,783,796,542                       1,871,160,188              284            9,734
  CATG D1 EXCEPTION VALUES:             1,398,145                           1,270,284
 TOTAL TEST VALUES (4):             1,785,194,687                       1,872,430,472
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                93,621,524
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               1,778,808,948 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                1,785,194,687 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               1,966,051,996 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                1,968,519,718 (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