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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:07:24                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              071/El Paso                                               VRSN:      W
                                                        071-908/Tornillo ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                4,860,875        1.1101             4,378,772              18              371         .005961274
      2           A                4,828,337        1.0182             4,742,032              18              266         .018762732
      3           A                4,841,510        0.9088             5,327,366              15              149         .024076437
      4           A                4,798,896        1.0045             4,777,398              16               84         .026146390
      5           D3               4,242,934        0.9867             4,300,126              17              906         .006363243
      6           F1               4,002,394        0.9683             4,133,424               9               34         .009560470
  RANDOM TOTALS:                  27,574,946                          27,659,118              93            1,810
  CATG J  EXCEPTION VALUES:        2,672,270                           2,610,584
  CATG D1 EXCEPTION VALUES:        7,074,481                           7,881,324
 TOTAL TEST VALUES (4):           37,321,697                          38,151,026
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            1,907,551
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             36,243,475 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              37,321,697 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             40,058,577 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              41,755,552 (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