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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:13:53                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              157/Mason                                                 VRSN:      W
                                                        157-901/Mason ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               11,699,040        0.8694            13,456,453               15              368
           2           A               11,759,482        0.9922            11,851,927               15              212
           3           A               11,682,595        0.9963            11,725,981               20              141
           4           A               11,723,657        0.9918            11,820,586               16               84
           5           D3              67,484,350        0.9953            67,803,024               20            1,289
           6           F1               3,150,028        0.9309             3,383,852                7               84
           7           F1               3,185,143        1.0291             3,095,076                6               38
           8           F1               3,091,305        0.9966             3,101,851                5               18
           9           F1               3,047,488        0.9787             3,113,812                5                8
  RANDOM TOTALS:                      126,823,088                         129,352,562              109            2,242
  CATG J  EXCEPTION VALUES:             5,530,890                           5,421,464
  CATG D1 EXCEPTION VALUES:            35,749,077                          35,398,883
 TOTAL TEST VALUES (4):               168,103,055                         170,172,909
 MARGIN OF ERROR PERCENT:               6.2733240
 MARGIN OF ERROR VALUE:                10,675,498
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 159,497,411 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  168,103,055 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 180,848,407 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  159,435,310 (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