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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:18:43                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              214/Starr                                                 VRSN:      W
                                                        214-901/Rio Grande City ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               60,884,638        0.9756            62,407,378               9            3,233         .070315342
      2           A               60,822,530        0.9531            63,815,476               8            1,894         .013378520
      3           A               60,819,240        0.9556            63,645,082               8            1,226         .051850596
      4           A               60,818,734        0.9688            62,777,389              12              622         .028101074
      5           C               12,665,522        0.8465            14,962,223              14            2,946         .091394238
      6           C               12,573,294        0.8708            14,438,785               7            1,600         .016721173
      7           C               13,015,916        1.0028            12,979,573              14              775         .027197468
      8           C               12,206,113        1.3652             8,940,897               6              170         .186817194
      9           D3              18,071,440        0.9540            18,942,809              15            6,655         .030510861
     10           F1              19,547,140        1.0727            18,222,373               8              266         .076580700
     11           F1              19,946,772        0.8546            23,340,477               6               81         .033133076
     12           F1              20,613,023        1.0056            20,498,233               6               30         .006875008
     13           F1              18,036,596        1.0435            17,284,711               3                6         .001009070
     14           G1             101,284,247        1.0603            95,524,141               7              134         .002755324
     15           G1             100,867,331        1.0228            98,618,822               6               57         .005009153
     16           G1             103,114,579        1.0246           100,638,863               6               33         .013167861
     17           G1              97,768,446        1.0639            91,896,274               5               16         .055957018
     18           L1              11,903,331        0.9934            11,982,415               7            1,120         .017084198
     19           L1              11,874,720        1.0569            11,235,424               9              198         .037879928
     20           L1              12,936,939        1.0038            12,887,965               6               35         .000521964
     21           L1              10,819,822        0.9835            11,001,344               2                3         .000349317
  RANDOM TOTALS:                 840,590,373                         836,040,654             164           21,100
  CATG D1 EXCEPTION VALUES:       32,688,510                          34,932,834
 TOTAL TEST VALUES (4):          873,278,883                         870,973,488
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           43,548,674
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            827,424,814 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             873,278,883 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            914,522,162 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             893,117,498 (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