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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:22:05                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              233/Val Verde                                             VRSN:      W
                                                        233-901/San Felipe-Del Rio CISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              164,724,988        1.0015           164,478,271              16            2,791         .078494040
      2           A              164,629,601        0.9155           179,824,796              27            1,530         .037000830
      3           A              164,733,242        0.9004           182,955,622              38            1,114         .014249198
      4           A              164,370,421        0.9054           181,544,534              39              713         .028832357
      5           F1             174,423,090        0.9223           189,117,521              22            1,109         .011169066
      6           L1              25,123,453        0.9810            25,610,044               8              423         .006891040
      7           L1              25,148,348        1.0049            25,025,722              12               87         .004895543
      8           L1              25,763,643        1.0158            25,362,909               5               31         .013465912
  RANDOM TOTALS:                 908,916,786                         973,919,419             167            7,798
  CATG D1 EXCEPTION VALUES:        8,586,653                           9,530,064
  CATG L1 EXCEPTION VALUES:       21,035,406                          20,649,179
 TOTAL TEST VALUES (4):          938,538,845                       1,004,098,662
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           50,204,933
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:             938,538,845 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:            953,893,729 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:          1,054,303,595 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           1,010,378,845 (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