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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:24:28                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              158/Matagorda                                             VRSN:      W
                                                        158-901/Bay City ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               79,699,810        0.9501            83,885,707              28            1,954         .014438649
      2           A               79,581,580        0.9889            80,474,851              37            1,146         .007962332
      3           A               79,701,720        0.9912            80,409,322              37              838         .007914385
      4           A               79,571,712        0.9458            84,131,647              24              475         .018093796
      5           F1              20,461,046        0.9623            21,262,648               8              322         .014490324
      6           F1              20,564,981        0.9752            21,087,962               8              134         .025281584
      7           F1              20,888,872        0.8843            23,621,929               8               54         .021675325
      8           F1              19,919,584        0.9744            20,442,923               5               16         .008232213
      9           G1              15,227,260        1.0048            15,154,518               5               16         .001096931
     10           G1              14,799,154        1.0035            14,747,538               4                7         .000099505
     11           G1              18,631,140        0.9871            18,874,623               3                5         .000156446
     12           L1              10,583,584        1.1392             9,290,365               7              305         .023969480
     13           L1              10,541,435        1.1238             9,380,170               6               81         .019130388
     14           L1              11,119,115        0.9826            11,316,014               6               33         .012270272
     15           L1               9,875,045        0.9762            10,115,801               3                4         .000538870
  RANDOM TOTALS:                 491,166,038                         504,196,018             189            5,390
  CATG J  EXCEPTION VALUES:       38,438,645                          38,244,954
  CATG D1 EXCEPTION VALUES:       13,058,006                          13,320,029
  CATG G1 EXCEPTION VALUES:       10,356,500                          10,567,041
 TOTAL TEST VALUES (4):          553,019,189                         566,328,042
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           28,316,402
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            538,011,640 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             553,019,189 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            594,644,444 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             844,863,578 (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