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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:38:06                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              028/Caldwell                                              VRSN:      W
                                                        028-906/Prairie Lea ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                3,479,478        0.8928             3,897,265              11               93         .024528630
      2           A                3,431,244        0.9782             3,507,712              10               54         .040729274
      3           A                3,439,330        0.9072             3,791,149               9               37         .039524991
      4           A                3,414,645        0.9383             3,639,183               9               25         .008946448
      5           D3              16,648,734        0.9796            16,995,441              13              865         .043319606
      6           G1               5,655,520        0.9943             5,687,941               2                3         .000265404
  RANDOM TOTALS:                  36,068,951                          37,518,691              54            1,077
  CATG J  EXCEPTION VALUES:        1,483,668                           1,370,116
  CATG D1 EXCEPTION VALUES:        1,410,447                           1,599,842
  CATG G1 EXCEPTION VALUES:       16,995,940                          16,844,364
 TOTAL TEST VALUES (4):           55,959,006                          57,333,013
 MARGIN OF ERROR PERCENT:          5.0000006
 MARGIN OF ERROR VALUE:            2,866,651
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             54,466,362 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              55,959,006 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             60,199,664 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              64,717,923 (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