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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:22:36                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              227/Travis                                                VRSN:      P
                                                        227-912/Lago Vista ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              140,859,997        0.9868           142,744,221               45            1,179
           2           A              140,810,282        0.9772           144,095,663               46              790
           3           A              141,002,870        0.9947           141,754,167               29              548
           4           A              140,636,636        0.9844           142,865,335               16              225
           5           C               47,697,870        1.1901            40,078,876               30            5,584
           6           C               25,526,729        0.8003            31,896,450               11            1,158
           7           C               38,915,173        0.8743            44,510,092               10              445
           8           C               33,853,479        0.9262            36,550,938               11              120
           9           D3              50,915,004        0.9448            53,889,716               20              751
  RANDOM TOTALS:                      760,218,040                         778,385,458              218           10,800
  CATG D1 EXCEPTION VALUES:               241,927                             292,567
 TOTAL TEST VALUES (4):               760,459,967                         778,678,025
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                38,933,901
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 739,744,124 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  760,459,967 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 817,611,926 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  765,721,086 (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