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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:08:12                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              113/Houston                                               VRSN:      P
                                                        113-901/Crockett ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               27,076,874        0.9675            27,986,433               24              971
           2           A               26,950,353        0.9253            29,126,070               26              601
           3           A               27,079,513        0.9525            28,429,935               35              399
           4           A               26,971,652        0.9820            27,466,041               16              201
           5           D3              51,303,330        0.9205            55,734,199               27            3,527
           6           F1              10,768,039        0.9954            10,817,801                7              177
           7           F1              11,126,566        1.0576            10,520,581                7               52
           8           F1              11,264,020        0.8189            13,755,062                5               14
           9           F1               9,874,949        1.0956             9,013,279                3                5
          10           L1               7,231,101        1.3817             5,233,481                7              197
          11           L1               7,266,565        1.0511             6,913,296                8               41
          12           L1               7,052,728        1.2891             5,471,048                5               14
  RANDOM TOTALS:                      223,965,690                         230,467,226              170            6,199
  CATG J  EXCEPTION VALUES:            11,529,724                          12,010,931
  CATG D1 EXCEPTION VALUES:            16,777,890                          14,072,536
  CATG L1 EXCEPTION VALUES:             6,191,480                           6,287,897
 TOTAL TEST VALUES (4):               258,464,784                         262,838,590
 MARGIN OF ERROR PERCENT:               5.0000002
 MARGIN OF ERROR VALUE:                13,141,930
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 249,696,660 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  258,464,784 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 275,980,520 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  248,722,581 (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