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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:56:21                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              039/Clay                                                  VRSN:      P
                                                        039-901/Byers ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                2,356,036        0.9968             2,363,600                9               89
           2           A                2,315,546        0.9976             2,321,117                8               46
           3           A                2,344,043        0.9845             2,380,948                7               32
           4           A                2,332,302        0.9997             2,333,002                8               22
           5           D3               3,886,380        0.9761             3,981,539               14              464
  RANDOM TOTALS:                       13,234,307                          13,380,206               46              653
  CATG J  EXCEPTION VALUES:               745,830                             750,870
  CATG D1 EXCEPTION VALUES:             4,524,800                           4,521,617
 TOTAL TEST VALUES (4):                18,504,937                          18,652,693
 MARGIN OF ERROR PERCENT:               5.0000019
 MARGIN OF ERROR VALUE:                   932,635
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  17,720,058 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   18,504,937 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  19,585,328 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   16,933,126 (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