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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:23:05                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              239/Washington                                            VRSN:      W
                                                        239-903/Burton ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                8,450,736        0.8775             9,630,468               7              269         .023534941
      2           A                8,456,802        0.8484             9,967,942               7              137         .010928881
      3           A                8,465,724        0.9503             8,908,475               8               90         .014667935
      4           A                8,379,430        1.0443             8,023,968               7               50         .013147771
      5           D3             111,745,819        0.9021           123,872,984              22            3,246         .035483945
      6           G1              22,200,584        1.0180            21,808,039               7               38         .000829166
      7           G1              22,311,031        0.9729            22,932,502               6               20         .006542741
      8           G1              22,906,329        1.0279            22,284,589               5               14         .008827039
      9           G1              19,970,380        1.0840            18,422,860               3                5         .027203992
  RANDOM TOTALS:                 232,886,835                         245,851,827              72            3,869
  CATG J  EXCEPTION VALUES:        5,912,215                           5,679,298
  CATG D1 EXCEPTION VALUES:        7,368,252                           7,118,931
 TOTAL TEST VALUES (4):          246,167,302                         258,650,056
 MARGIN OF ERROR PERCENT:          5.0000001
 MARGIN OF ERROR VALUE:           12,932,503
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            245,717,553 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             246,167,302 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            271,582,559 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             255,569,568 (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