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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:16:53                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              177/Nolan                                                 VRSN:      W
                                                        177-903/Blackwell ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                2,438,404        0.9986             2,441,823                7              141
           2           A                2,415,872        1.0143             2,381,812                9               78
           3           A                2,427,005        1.0510             2,309,234                6               46
           4           A                2,425,601        1.0876             2,230,233                7               28
           5           D3              15,223,560        0.9065            16,793,778               11            1,816
           6           G1              46,442,960        0.9967            46,596,729               17              176
  RANDOM TOTALS:                       71,373,402                          72,753,609               57            2,285
  CATG J  EXCEPTION VALUES:             5,230,910                           5,873,570
  CATG D1 EXCEPTION VALUES:            10,099,838                          11,788,003
 TOTAL TEST VALUES (4):                86,704,150                          90,415,182
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 4,520,759
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  85,894,423 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   86,704,150 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  94,935,941 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  120,089,704 (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