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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:09:37                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              084/Galveston                                             VRSN:      W
                                                        084-906/Texas 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              149,367,594        0.9827           151,997,145              35            2,937         .031277878
      2           A              149,520,454        0.9496           157,456,249              48            1,966         .012677603
      3           A              149,172,690        0.9811           152,046,366              55            1,415         .008594305
      4           A              149,227,922        1.0117           147,502,147              50              868         .007630611
      5           F1              17,416,761        0.7836            22,226,596               8              256         .061423820
      6           F1              17,472,062        0.9573            18,251,397               7               98         .014150304
      7           F1              17,991,113        0.8820            20,398,087               9               40         .006643491
      8           F1              16,602,807        0.8558            19,400,335               6                9         .035063369
      9           L1              15,138,975        0.9920            15,261,064               7              262         .015504910
     10           L1              15,762,499        0.9832            16,031,834               6               43         .010159332
     11           L1              29,191,878        0.8620            33,865,288               5               11         .041246834
  RANDOM TOTALS:                 726,864,755                         754,436,508             236            7,905
  CATG J  EXCEPTION VALUES:       20,782,390                          22,035,712
  CATG D1 EXCEPTION VALUES:           31,660                              22,918
 TOTAL TEST VALUES (4):          747,678,805                         776,495,138
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           38,824,757
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            737,670,381 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             747,678,805 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            815,319,895 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           3,241,672,467 (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