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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:05:22                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              061/Denton                                                VRSN:      W
                                                        061-911/Northwest ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              475,855,754        0.9969           477,335,494              59            3,813         .003721428
      2           A              475,710,534        1.0069           472,450,625              56            2,512         .001632827
      3           A              475,972,932        1.0099           471,306,993              56            1,912         .001442443
      4           A              475,590,852        1.0119           469,997,877              57            1,231         .002478197
      5           D3             181,206,891        1.0015           180,935,488              16            4,923         .005045061
      6           F1             231,802,052        1.0056           230,511,189               7              333         .011416671
      7           F1             233,679,262        1.0248           228,024,260               6               33         .010492402
      8           F1             236,429,885        1.0453           226,183,761               5               16         .011390777
      9           F1             216,489,643        1.0336           209,452,054               5                8         .004979080
     10           G1             422,343,435        0.9946           424,636,472               7              582         .005105293
     11           G1             420,531,610        0.9979           421,416,585               7              325         .008264870
     12           G1             423,338,270        1.1339           373,347,094               7              225         .007587383
     13           G1             418,960,292        1.0264           408,184,228               7              112         .004552773
     14           L1             125,517,753        1.0211           122,924,055               7              221         .008207580
     15           L1             134,448,216        0.9733           138,136,459               6               20         .017036905
     16           L1             156,467,055        0.9976           156,843,479               2                3         .000453563
  RANDOM TOTALS:               5,104,344,436                       5,011,686,113             310           16,269
  CATG D1 EXCEPTION VALUES:       11,602,443                          10,558,267
  CATG L1 EXCEPTION VALUES:       48,339,089                          47,689,163
 TOTAL TEST VALUES (4):        5,164,285,968                       5,069,933,543
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          253,496,677
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          4,816,436,866 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           5,164,285,968 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          5,323,430,220 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           5,910,505,320 (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