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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:39:41                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              228/Trinity                                               VRSN:      W
                                                        228-904/Centerville ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                1,095,283        1.1223               975,927               8               54         .097195108
      2           A                1,071,126        1.1810               906,965               8               30         .165813438
      3           A                1,107,581        0.8687             1,274,987               8               19         .006382337
      4           A                1,016,450        1.1557               879,510               5               10         .034068037
      5           D3               7,219,815        0.8991             8,030,047              20            1,370         .048707799
      6           G1               3,776,997        1.0254             3,683,438               5                7         .027678757
  RANDOM TOTALS:                  15,287,252                          15,750,874              54            1,490
  CATG D1 EXCEPTION VALUES:        9,273,691                           8,930,553
 TOTAL TEST VALUES (4):           24,560,943                          24,681,427
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            1,234,071
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             23,447,356 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              24,560,943 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             25,915,498 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              22,043,853 (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