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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:24:35                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              158/Matagorda                                             VRSN:      W
                                                        158-904/Matagorda ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               27,660,905        0.9209            30,036,817              10              398         .318262986
      2           A               27,528,121        0.8486            32,439,454               8              218         .056950251
      3           A               27,661,447        0.8973            30,827,423              11              147         .023819201
      4           A               27,513,453        0.9919            27,738,132              10               87         .016007153
      5           C                3,996,068        0.8691             4,597,938               9              405         .042167283
      6           C                4,187,480        0.8775             4,772,057               8               95         .024783142
      7           C                4,101,561        1.0255             3,999,572               6               54         .038672451
      8           C                3,617,274        1.0855             3,332,357               7               26         .024548869
      9           D3               5,655,142        1.3478             4,195,832               9              955        1.758022144
  RANDOM TOTALS:                 131,921,451                         141,939,582              78            2,385
  CATG D1 EXCEPTION VALUES:        2,677,726                           2,690,748
 TOTAL TEST VALUES (4):          134,599,177                         144,630,330
 MARGIN OF ERROR PERCENT:          8.9280907
 MARGIN OF ERROR VALUE:           12,912,727
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            131,717,603 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             134,599,177 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            157,543,057 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             147,249,508 (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