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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:57:15                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              043/Collin                                                VRSN:      W
                                                        043-901/Allen ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              765,519,993        1.0082           759,293,784               55            5,390
           2           A              762,296,195        0.9983           763,594,305               55            4,214
           3           A              763,960,432        1.0060           759,404,008               55            3,474
           4           A              763,740,072        0.9972           765,884,549               56            2,241
           5           F1             132,011,381        1.0422           126,666,073                6              120
           6           F1             133,384,879        0.8744           152,544,464                9               40
           7           F1             141,010,470        0.9481           148,729,533                6               14
           8           F1             119,698,404        0.9836           121,694,189                3                5
           9           L1              82,056,814        0.8433            97,304,416                7              248
          10           L1              87,967,775        0.9717            90,529,767                7               20
          11           L1              79,629,508        0.8018            99,313,430                3                5
  RANDOM TOTALS:                    3,831,275,923                       3,884,958,518              262           15,771
  CATG D1 EXCEPTION VALUES:             1,748,743                           1,635,360
  CATG L1 EXCEPTION VALUES:            92,815,117                          99,410,899
 TOTAL TEST VALUES (4):             3,925,839,783                       3,986,004,777
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               199,300,239
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               3,786,704,538 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                3,925,839,783 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               4,185,305,016 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                4,402,046,133 (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