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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:16:46                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              178/Nueces                                                VRSN:      P
                                                        178-909/Robstown ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               31,354,218        0.8749            35,837,488               19            1,561
           2           A               31,383,213        0.8935            35,123,909               17              989
           3           A               31,375,293        0.9712            32,305,697               15              640
           4           A               31,358,327        0.9595            32,681,946               18              358
           5           D3              11,308,314        0.9541            11,852,336               10              999
           6           F1               8,170,027        0.8330             9,807,956                7              166
           7           F1               8,092,764        0.9210             8,786,932                7               56
           8           F1               8,797,827        0.9530             9,231,718                7               23
           9           F1               7,483,166        0.9835             7,608,710                6                7
          10           L1               8,588,415        0.9653             8,897,146                7              154
          11           L1               8,580,803        1.0533             8,146,590                6               31
          12           L1               8,854,888        1.0821             8,183,059                5               11
  RANDOM TOTALS:                      195,347,255                         208,463,487              124            4,995
  CATG J  EXCEPTION VALUES:            14,342,360                          14,113,236
  CATG D1 EXCEPTION VALUES:            15,149,881                          13,322,967
  CATG L1 EXCEPTION VALUES:             4,427,452                           4,437,784
 TOTAL TEST VALUES (4):               229,266,948                         240,337,474
 MARGIN OF ERROR PERCENT:               5.0000001
 MARGIN OF ERROR VALUE:                12,016,874
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 228,320,600 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  229,266,948 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 252,354,348 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  221,803,609 (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