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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:03:43                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              091/Grayson                                               VRSN:      W
                                                        091-901/Bells ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               13,528,219        0.9773            13,842,442               14              397
           2           A               13,528,829        0.9124            14,827,739               14              195
           3           A               13,450,093        0.9298            14,465,576               16              129
           4           A               13,508,354        0.9495            14,226,808               12               83
           5           D3              30,514,664        1.0856            28,108,570               21            1,771
  RANDOM TOTALS:                       84,530,159                          85,471,135               77            2,575
  CATG J  EXCEPTION VALUES:             5,111,692                           5,142,867
  CATG D1 EXCEPTION VALUES:             3,367,151                           2,645,546
 TOTAL TEST VALUES (4):                93,009,002                          93,259,548
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 4,662,977
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  88,596,571 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   93,009,002 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  97,922,525 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   90,816,387 (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