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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:13:30                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              158/Matagorda                                             VRSN:      P
                                                        158-901/Bay City ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               74,793,060        0.9266            80,717,742               63            1,943
           2           A               74,816,064        0.9499            78,762,042               61            1,141
           3           A               74,907,689        0.9305            80,502,621               59              835
           4           A               74,745,302        0.9518            78,530,471               38              473
           5           F1              19,532,042        0.9191            21,251,270               11              318
           6           F1              19,607,811        0.9510            20,618,098               12              134
           7           F1              19,750,554        0.7273            27,155,993               10               54
           8           F1              19,157,719        0.8830            21,696,171                7               16
           9           G1              67,219,000        1.0147            66,245,196               14               65
          10           L1              11,263,936        1.0057            11,200,095                7              296
          11           L1              11,273,447        1.0451            10,786,955                7               78
          12           L1              11,126,714        1.0907            10,201,443                6               28
          13           L1              10,847,456        1.0384            10,446,317                3                4
  RANDOM TOTALS:                      489,040,794                         518,114,414              298            5,385
  CATG J  EXCEPTION VALUES:            36,662,250                          36,749,470
  CATG D1 EXCEPTION VALUES:            12,924,129                          13,068,730
 TOTAL TEST VALUES (4):               538,627,173                         567,932,614
 MARGIN OF ERROR PERCENT:               5.0000001
 MARGIN OF ERROR VALUE:                28,396,631
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:                  538,627,173 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:                 539,535,983 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:                 596,329,245 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  826,706,719 (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