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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:19:11                                       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            2,366,317,593        1.0036         2,357,829,407              75           25,591         .008151640
      2           A            2,361,014,727        0.9920         2,380,055,168              74           19,371         .003565344
      3           A            2,365,242,005        1.0022         2,360,049,895              82           14,655         .003327635
      4           A            2,357,814,654        0.9993         2,359,466,280              68            8,898         .004364645
      5           B              422,606,150        0.9815           430,571,727               7            2,608         .000828950
      6           B              426,384,039        1.0043           424,558,438               9               99         .007148048
      7           B              416,324,995        0.9502           438,144,596               7               48         .005018438
      8           B              419,539,625        0.9797           428,232,750               7               20         .000819720
      9           F1           1,006,880,138        0.9786         1,028,898,567              25            1,614         .021113322
     10           F1           1,006,589,436        1.0060         1,000,585,920               9              482         .091369505
     11           F1           1,010,882,837        0.9580         1,055,201,291               9              183         .010930324
     12           F1           1,000,300,063        0.8836         1,132,073,408               8               58         .065809336
     13           L1             564,363,833        1.0772           523,917,409               7            2,584         .028784231
     14           L1             565,129,831        1.0308           548,243,918               7              357         .002246603
     15           L1             569,787,005        1.0349           550,572,041               7              113         .003300451
     16           L1             555,597,692        0.9954           558,165,252               7               27         .000350869
  RANDOM TOTALS:              17,414,774,623                      17,576,566,067             408           76,708
  CATG D1 EXCEPTION VALUES:          108,368                             158,350
 TOTAL TEST VALUES (4):       17,414,882,991                      17,576,724,417
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          878,836,221
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:         16,697,888,196 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:          17,414,882,991 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:         18,455,560,638 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):          18,180,076,404 (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