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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:21:04                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              218/Sutton                                                VRSN:      P
                                                        218-901/Sonora ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               14,589,075        0.9778            14,920,306                7              480
           2           A               14,569,699        0.9785            14,889,830                7              249
           3           A               14,541,903        0.9048            16,071,953                7              171
           4           A               14,587,940        0.8695            16,777,389               15              103
           5           D3              18,095,514        1.0716            16,886,445               13            3,754
           6           G1             621,856,370        1.0383           598,917,818               20            1,861
  RANDOM TOTALS:                      698,240,501                         678,463,741               69            6,618
  CATG J  EXCEPTION VALUES:            16,974,650                          19,858,511
  CATG D1 EXCEPTION VALUES:            35,243,550                          39,913,351
 TOTAL TEST VALUES (4):               750,458,701                         738,235,603
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                36,911,780
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 701,323,823 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  750,458,701 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 775,147,383 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  871,106,355 (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