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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:22:38                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              227/Travis                                                VRSN:      P
                                                        227-913/Lake Travis ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              727,091,875        0.9800           741,930,485               65            3,761
           2           A              725,931,343        0.9793           741,275,751               65            2,385
           3           A              726,495,939        0.9867           736,288,577               65            1,608
           4           A              726,389,070        0.9924           731,951,904               62              752
           5           C               68,584,515        0.6494           105,612,127               10            3,227
           6           C               68,688,550        0.7562            90,833,840                9              891
           7           C               68,458,719        0.9144            74,867,365                9              470
           8           C               68,508,867        0.9288            73,760,623                7              127
           9           D3             160,433,477        0.9127           175,778,982               15            1,765
          10           F1              66,988,540        0.9860            67,939,696                9              182
          11           F1              67,358,277        0.9569            70,392,180                6               46
          12           F1              68,256,507        0.8496            80,339,580                6               16
          13           F1              65,309,515        0.8658            75,432,565                5                6
  RANDOM TOTALS:                    3,608,495,194                       3,766,403,675              333           15,236
  CATG D1 EXCEPTION VALUES:             1,888,408                           2,219,946
 TOTAL TEST VALUES (4):             3,610,383,602                       3,768,623,621
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               188,431,181
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               3,580,192,440 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                3,610,383,602 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               3,957,054,802 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                3,580,440,194 (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