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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:18:28                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              188/Potter                                                VRSN:      P
                                                        191-901/Canyon ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              341,601,693        0.9878           345,820,706               61            4,075
           2           A              341,660,741        0.9756           350,205,762               60            2,655
           3           A              341,719,026        0.9864           346,430,481               61            1,983
           4           A              341,386,817        0.9597           355,722,431               59            1,235
           5           F1              43,879,356        0.9230            47,539,931                7              408
           6           F1              44,204,028        0.9679            45,670,036                7              111
           7           F1              45,461,406        0.9664            47,042,018                6               34
           8           F1              41,295,894        0.9951            41,499,240                4                8
           9           L1              45,100,026        0.9938            45,381,391                7              534
          10           L1              46,008,616        0.9903            46,459,271                8               70
          11           L1              31,391,606        0.9750            32,196,519                4                9
  RANDOM TOTALS:                    1,663,709,209                       1,703,967,786              284           11,122
  CATG D1 EXCEPTION VALUES:            25,979,244                          34,109,308
  CATG L1 EXCEPTION VALUES:            51,452,126                          52,669,077
 TOTAL TEST VALUES (4):             1,741,140,579                       1,790,746,171
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                89,537,309
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               1,701,208,862 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                1,741,140,579 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               1,880,283,480 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                1,893,692,552 (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