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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:32:12                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              184/Parker                                                VRSN:      W
                                                        184-909/Brock ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               20,174,373        0.9917            20,343,222              12              226         .012470041
      2           A               20,132,983        1.0500            19,174,270              34              128         .009523691
      3           A               20,131,086        1.0763            18,703,973               7               87         .013920578
      4           A               20,029,606        0.9453            21,188,624              11               50         .009733515
      5           D3              92,313,690        1.0340            89,278,230              27            2,183         .019162368
  RANDOM TOTALS:                 172,781,738                         168,688,319              91            2,674
  CATG D1 EXCEPTION VALUES:        4,370,669                           3,333,434
 TOTAL TEST VALUES (4):          177,152,407                         172,021,753
 MARGIN OF ERROR PERCENT:          5.0000002
 MARGIN OF ERROR VALUE:            8,601,088
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            163,420,665 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             177,152,407 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            180,622,841 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             197,706,277 (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