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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:24:25                                       2005 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   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               16,120,600        0.9706            16,608,902              13              387         .044034431
      2           A               16,169,441        0.9190            17,594,604              14              214         .035107199
      3           A               16,072,167        0.9128            17,607,545              13              134         .031661644
      4           A               16,076,788        0.9645            16,668,520              11               79         .062189495
      5           D3              72,813,170        0.7228           100,737,645              22            8,744         .228270934
      6           F1               3,488,387        0.9235             3,777,355               6               84         .024083969
      7           F1               3,514,555        0.9340             3,762,907               6               36         .007645085
      8           F1               3,604,452        1.0040             3,590,092               7               18         .039455816
      9           F1               3,251,011        0.9477             3,430,422               4                7         .010222068
  RANDOM TOTALS:                 151,110,571                         183,777,992              96            9,703
  CATG J  EXCEPTION VALUES:        5,429,884                           5,630,500
  CATG D1 EXCEPTION VALUES:       35,880,310                          37,945,395
 TOTAL TEST VALUES (4):          192,420,765                         227,353,887
 MARGIN OF ERROR PERCENT:          9.1075399
 MARGIN OF ERROR VALUE:           20,706,346
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:             192,420,765 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:            206,647,541 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:            248,060,233 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             210,909,683 (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