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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:24:57                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              245/Willacy                                               VRSN:      P
                                                        245-904/San Perlita ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                5,333,258        0.8974             5,943,011                9              236
           2           A                5,316,158        0.9188             5,785,980               13              134
           3           A                5,339,938        0.9605             5,559,540               15               86
           4           A                5,280,403        1.0760             4,907,438               10               45
           5           C                1,027,817        0.8304             1,237,737                8              245
           6           C                1,035,230        0.8253             1,254,368                8               76
           7           C                1,084,371        0.9488             1,142,887                6               20
           8           C                2,719,735        1.0244             2,654,954                2                3
           9           D3               3,143,331        0.9075             3,463,726               16           96,357
  RANDOM TOTALS:                       30,280,241                          31,949,641               87           97,202
  CATG J  EXCEPTION VALUES:             1,279,470                           1,300,366
  CATG D1 EXCEPTION VALUES:            16,960,656                          17,078,602
 TOTAL TEST VALUES (4):                48,520,367                          50,328,609
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 2,516,430
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  47,812,179 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   48,520,367 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  52,845,039 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   55,412,441 (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