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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:37:35                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      W
                                                        220-901/Arlington ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A            2,366,718,233        1.0036         2,358,228,610              75           25,591         .008151640
      2           A            2,361,414,469        0.9920         2,380,458,134              74           19,371         .003565344
      3           A            2,365,642,463        1.0022         2,360,449,474              82           14,655         .003327635
      4           A            2,358,213,854        0.9993         2,359,865,760              68            8,898         .004364645
      5           B              426,082,685        0.9815           434,113,790               7            2,608         .000828950
      6           B              429,891,653        1.0043           428,051,034               9               99         .007148048
      7           B              419,749,859        0.9502           441,748,957               7               48         .005018438
      8           B              422,990,934        0.9797           431,755,572               7               20         .000819720
      9           F1           1,012,563,320        0.9786         1,034,706,029              25            1,614         .021113322
     10           F1           1,012,270,977        1.0060         1,006,233,576               9              482         .091369505
     11           F1           1,016,588,613        0.9580         1,061,157,216               9              183         .010930324
     12           F1           1,005,946,105        0.8836         1,138,463,224               8               58         .065809336
     13           L1             567,601,925        1.0772           526,923,436               7            2,584         .028784231
     14           L1             568,372,318        1.0308           551,389,521               7              357         .002246603
     15           L1             573,056,213        1.0349           553,731,001               7              113         .003300451
     16           L1             558,785,487        0.9954           561,367,779               7               27         .000350869
  RANDOM TOTALS:              17,465,889,108                      17,628,643,113             408           76,708
  CATG D1 EXCEPTION VALUES:          109,695                             159,205
 TOTAL TEST VALUES (4):       17,465,998,803                      17,628,802,318
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          881,440,116
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:         16,747,362,202 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:          17,465,998,803 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:         18,510,242,434 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):          18,265,617,135 (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