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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:57:57                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              049/Cooke                                                 VRSN:      P
                                                        049-909/Sivells Bend ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                8,121,955        0.9721             8,355,061               15              106
           2           A                8,154,095        1.0069             8,098,217               12               58
           3           A                8,291,287        1.0102             8,207,570               12               45
           4           A                8,006,770        1.0085             7,939,286               13               30
           5           D3               6,793,574        0.9480             7,166,217               14              566
  RANDOM TOTALS:                       39,367,681                          39,766,351               66              805
  CATG D1 EXCEPTION VALUES:             3,408,016                           2,998,273
  CATG G1 EXCEPTION VALUES:            23,684,907                          23,051,150
 TOTAL TEST VALUES (4):                66,460,604                          65,815,774
 MARGIN OF ERROR PERCENT:               5.0000005
 MARGIN OF ERROR VALUE:                 3,290,789
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  62,524,985 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   66,460,604 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  69,106,563 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   67,785,586 (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