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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:22:34                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              227/Travis                                                VRSN:      P
                                                        227-910/Del Valle ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              131,881,566        1.0155           129,868,603               22            2,044
           2           A              131,954,976        0.9733           135,574,824               33            1,304
           3           A              132,753,540        0.9814           135,269,554               42            1,067
           4           A              130,975,761        0.9956           131,554,601               29              717
           5           B               72,547,878        1.0341            70,155,573               11               69
           6           B              204,066,628        0.9497           214,874,832                8               14
           7           D3             140,529,273        0.7695           182,624,136               13            3,330
           8           F1              72,361,779        0.9744            74,262,909                8              155
           9           F1              75,010,818        1.0290            72,896,810                6               38
          10           F1              72,700,552        1.0316            70,473,587                6               16
          11           F1              69,038,518        0.9638            71,631,581                4                7
          12           L1              84,331,890        0.9696            86,975,959                7              246
          13           L1              85,382,253        0.9579            89,134,829                6               43
          14           L1              84,676,816        0.9655            87,702,554                5               18
          15           L1              80,389,522        1.0258            78,367,637                4                7
  RANDOM TOTALS:                    1,568,601,770                       1,631,367,989              204            9,075
  CATG D1 EXCEPTION VALUES:            10,254,569                           9,939,315
 TOTAL TEST VALUES (4):             1,578,856,339                       1,641,307,304
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                82,065,365
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               1,559,241,939 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                1,578,856,339 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               1,723,372,669 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                2,105,578,046 (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