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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:39:34                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              227/Travis                                                VRSN:      W
                                                        227-913/Lake Travis ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              802,702,425        0.8252           972,736,821              53            4,014         .113281677
      2           A              802,523,295        0.9075           884,323,190              43            2,537         .028586276
      3           A              802,367,437        0.8758           916,153,730              50            1,686         .032753788
      4           A              802,295,390        0.8988           892,629,495              32              800         .032112479
      5           C               66,651,235        0.9669            68,932,914              45            3,220         .178087218
      6           C               64,480,986        0.7545            85,461,877              15              995        1.466254753
      7           C               65,526,255        1.0395            63,036,320              14              501         .012972127
      8           C               65,465,811        0.8664            75,560,724               7              163         .115470466
      9           D3             121,194,160        0.9592           126,349,208              12            1,544         .069127732
     10           F1              70,651,065        0.8956            78,886,852               9              196         .008544845
     11           F1              70,760,372        0.8940            79,150,304               8               51         .017110072
     12           F1              74,196,304        0.9774            75,911,913               5               19         .011234961
     13           F1              66,277,285        0.9433            70,261,089               4                7         .000359920
  RANDOM TOTALS:               3,875,092,020                       4,389,394,437             297           15,733
  CATG D1 EXCEPTION VALUES:        1,874,438                           2,378,646
 TOTAL TEST VALUES (4):        3,876,966,458                       4,391,773,083
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          219,588,654
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:           3,876,966,458 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:          4,172,184,429 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:          4,611,361,737 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           3,850,559,710 (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