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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:03:55                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              091/Grayson                                               VRSN:      W
                                                        091-908/Van Alstyne ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               48,141,599        0.9220            52,214,316               16              675
           2           A               48,268,991        0.9413            51,279,073               13              392
           3           A               48,115,022        1.0203            47,157,720               22              279
           4           A               48,100,455        1.0280            46,790,326               13              181
           5           D3              48,989,577        0.9677            50,624,757               26            1,922
  RANDOM TOTALS:                      241,615,644                         248,066,192               90            3,449
  CATG D1 EXCEPTION VALUES:             4,689,794                           3,786,774
 TOTAL TEST VALUES (4):               246,305,438                         251,852,966
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                12,592,648
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 239,260,318 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  246,305,438 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 264,445,614 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  269,034,475 (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