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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:40:45                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              234/Van Zandt                                             VRSN:      W
                                                        234-905/Martins Mill ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                3,560,593        0.9529             3,736,586               6               71         .003019822
      2           A                3,564,582        0.9537             3,737,634               6               42         .004082604
      3           A                3,555,116        1.0167             3,496,721               7               28         .004719333
      4           A                3,442,661        1.0058             3,422,809               6               19         .004877219
      5           D3              48,397,510        1.1275            42,924,621              20            1,961         .076214201
  RANDOM TOTALS:                  62,520,462                          57,318,371              45            2,121
  CATG D1 EXCEPTION VALUES:        4,200,760                           2,773,888
 TOTAL TEST VALUES (4):           66,721,222                          60,092,259
 MARGIN OF ERROR PERCENT:          8.8788192
 MARGIN OF ERROR VALUE:            5,335,483
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             54,756,776 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             65,427,742 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              66,721,222 (OUTSIDE CONFIDENCE INTERVAL)
 VALUE ASSIGNED (6):              67,318,315 (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