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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:07:16                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              071/El Paso                                               VRSN:      W
                                                        071-905/Ysleta ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              774,159,313        0.9007           859,508,508              62           13,100         .012988322
      2           A              774,078,803        0.9528           812,425,276              61           10,682         .005321213
      3           A              774,198,153        0.9254           836,609,199              61            8,770         .010334650
      4           A              773,937,926        0.9050           855,180,029              62            5,937         .010211734
      5           B               75,134,308        0.8930            84,136,963              23            1,363         .101766577
      6           B               75,320,372        0.9403            80,102,491              23              599         .007800413
      7           B               76,411,925        0.8658            88,255,862              10               63         .016922357
      8           B               73,513,137        0.9342            78,691,005              10               15         .010536037
      9           F1             276,466,301        0.9232           299,465,231              11              657         .023332729
     10           F1             275,215,181        0.9296           296,057,639               9              231         .011461308
     11           F1             278,009,211        0.8884           312,932,475               8              101         .005045298
     12           F1             273,270,183        0.9404           290,589,306               8               35         .007493406
     13           L1             589,010,451        0.9915           594,059,961              11            4,602         .064905132
  RANDOM TOTALS:               5,088,725,264                       5,488,013,945             359           46,155
  CATG D1 EXCEPTION VALUES:          829,936                           1,012,085
 TOTAL TEST VALUES (4):        5,089,555,200                       5,489,026,030
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          274,451,302
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:           5,089,555,200 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:          5,214,574,728 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:          5,763,477,332 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           4,759,443,293 (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