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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:55:15                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              031/Cameron                                               VRSN:      P
                                                        031-901/Brownsville ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              550,821,717        0.9199           598,784,343               50           14,294
           2           A              550,896,426        0.9519           578,733,508               58            8,591
           3           A              550,868,150        0.9589           574,479,247               54            5,887
           4           A              550,795,228        0.9554           576,507,461               61            3,188
           5           C               54,611,999        0.9890            55,219,413                7            4,120
           6           C               52,042,745        0.9282            56,068,460                7            2,163
           7           C               53,200,290        0.9638            55,198,475                7              715
           8           C               53,237,248        1.0189            52,249,728                7              178
           9           F1             195,079,437        0.7501           260,071,240               12            1,072
          10           F1             194,926,832        0.9694           201,079,876                7              331
          11           F1             196,782,888        0.9629           204,364,823                8              115
          12           F1             192,445,345        0.9399           204,750,872                6               28
          13           L1              74,565,483        0.9967            74,812,364                7            1,130
          14           L1              74,774,484        0.9670            77,326,250                7              259
          15           L1              77,061,086        0.9948            77,463,898                7               66
          16           L1              71,839,483        1.0332            69,531,052                5               12
  RANDOM TOTALS:                    3,493,948,841                       3,716,641,010              310           42,149
  CATG D1 EXCEPTION VALUES:             4,854,253                           3,533,465
 TOTAL TEST VALUES (4):             3,498,803,094                       3,720,174,475
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               186,008,724
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:                3,498,803,094 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:               3,534,165,751 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:               3,906,183,199 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                3,646,446,868 (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