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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:15:26                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              170/Montgomery                                            VRSN:      P
                                                        170-904/Willis ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              219,338,791        0.9557           229,505,902               11            3,738
           2           A              219,305,868        0.9326           235,155,338               16            1,731
           3           A              219,520,791        0.9253           237,242,830               16            1,044
           4           A              219,129,518        0.9111           240,510,941               16              547
           5           C               23,696,914        0.8795            26,943,620               12            4,356
           6           C               23,827,948        0.9003            26,466,676                8            1,260
           7           C               23,246,038        0.9082            25,595,726               10              449
           8           C               23,540,730        0.9114            25,829,197                8              164
           9           D3              45,452,375        0.9705            46,833,977               10            1,890
          10           F1              23,262,816        0.9391            24,771,394                7              205
          11           F1              23,517,108        0.9298            25,292,652                7               59
          12           F1              23,046,852        0.8976            25,676,083                6               23
          13           F1              23,063,531        0.9691            23,798,918                3                5
          14           L1              17,752,206        0.9178            19,342,129                7              294
          15           L1              17,997,701        1.0143            17,743,962                8               72
          16           L1              18,568,740        0.9459            19,630,764                5               15
  RANDOM TOTALS:                    1,164,267,927                       1,250,340,109              150           15,852
  CATG D1 EXCEPTION VALUES:            35,937,608                          35,152,030
  CATG L1 EXCEPTION VALUES:             7,843,300                           7,946,983
 TOTAL TEST VALUES (4):             1,208,048,835                       1,293,439,122
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                64,671,956
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:                1,208,048,835 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:               1,228,767,166 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:               1,358,111,078 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                1,176,821,434 (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