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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:18:27                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              187/Polk                                                  VRSN:      W
                                                        187-901/Big Sandy ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                5,199,096        0.9050             5,744,857                7              290
           2           A                5,216,991        1.0342             5,044,470               10              147
           3           A                5,259,962        1.0697             4,917,231                7               88
           4           A                5,158,536        1.1544             4,468,586                7               48
           5           D3               9,677,787        1.1714             8,261,727               10            1,253
           6           G1             228,778,650        0.9866           231,885,921               16               75
  RANDOM TOTALS:                      259,291,022                         260,322,792               57            1,901
  CATG D1 EXCEPTION VALUES:            25,729,592                          24,214,373
 TOTAL TEST VALUES (4):               285,020,614                         284,537,165
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                14,226,858
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 270,310,307 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  285,020,614 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 298,764,023 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  320,513,639 (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