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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:43:33                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              057/Dallas                                                VRSN:      W
                                                        057-907/Duncanville ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              475,017,930        1.0077           471,388,241              43            5,124         .004896820
      2           A              475,104,136        1.0242           463,878,282              43            3,975         .005156262
      3           A              475,116,365        1.0111           469,900,470              43            3,108         .003180286
      4           A              475,064,635        1.0145           468,274,653              46            1,971         .004413377
      5           B               40,806,109        0.9569            42,644,068              17              249         .088625665
      6           B               41,339,143        0.9223            44,821,797               4                8         .004192137
      7           B               37,064,915        0.9840            37,667,597               3                5         .000590580
      8           B               36,049,912        0.9766            36,913,692               3                4         .005841082
      9           F1             109,698,514        0.9562           114,723,399              15              380         .008396580
     10           F1             109,473,106        1.0162           107,727,914              14              117         .016175831
     11           F1             110,461,336        0.9675           114,171,924              12               48         .013522758
     12           F1             108,106,919        0.9711           111,324,188               9               20         .002583511
     13           L1              54,136,919        1.1156            48,527,177               7              454         .013195503
     14           L1              54,846,094        0.9980            54,956,006               7               72         .001084285
     15           L1              57,779,819        1.0085            57,292,830               7               21         .005515691
     16           L1              49,919,716        0.9925            50,296,943               5                6         .001263511
  RANDOM TOTALS:               2,709,985,568                       2,694,509,181             278           15,562
  CATG D1 EXCEPTION VALUES:          175,787                             190,280
 TOTAL TEST VALUES (4):        2,710,161,355                       2,694,699,461
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          134,734,973
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          2,559,964,488 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           2,710,161,355 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          2,829,434,434 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           2,999,912,114 (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