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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:21:14                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      P
                                                        220-902/Birdville ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              899,838,684        1.0363           868,318,715               50           11,086
           2           A              898,555,809        1.0254           876,297,844               50            8,491
           3           A              900,772,343        1.0077           893,889,395               51            6,502
           4           A              897,244,131        1.0159           883,201,231               46            4,613
           5           B              102,475,889        0.9722           105,406,181               21              551
           6           B              101,607,563        0.9691           104,847,346                7               21
           7           B              109,464,762        0.9704           112,803,753                6               13
           8           B               90,845,068        1.0606            85,654,411                3                5
           9           F1             314,859,376        0.8655           363,788,996               12              827
          10           F1             314,117,833        0.8884           353,577,029               10              220
          11           F1             319,294,802        0.8852           360,703,572               12               76
          12           F1             309,046,653        0.9094           339,835,774                5               19
          13           L1             163,840,986        1.0100           162,218,798                7            1,170
          14           L1             164,558,877        1.0040           163,903,264                8              241
          15           L1             164,726,407        1.0458           157,512,342                7               67
          16           L1             161,922,776        0.9805           165,143,066                7               17
  RANDOM TOTALS:                    5,913,171,959                       5,997,101,717              302           33,919
  CATG D1 EXCEPTION VALUES:                49,490                              43,788
 TOTAL TEST VALUES (4):             5,913,221,449                       5,997,145,505
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               299,857,275
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               5,697,288,230 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                5,913,221,449 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               6,297,002,780 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                5,985,090,686 (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