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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:15:58                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              174/Nacogdoches                                           VRSN:      P
                                                        174-909/Martinsville ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                2,203,457        1.0113             2,178,836                8               61
           2           A                2,277,719        0.9525             2,391,306                6               37
           3           A                2,195,250        0.9775             2,245,780                6               25
           4           A                2,218,238        0.9531             2,327,393                6               14
           5           D3              18,720,740        1.0139            18,464,089               20            1,009
  RANDOM TOTALS:                       27,615,404                          27,607,404               46            1,146
  CATG D1 EXCEPTION VALUES:             7,125,980                           5,462,093
 TOTAL TEST VALUES (4):                34,741,384                          33,069,497
 MARGIN OF ERROR PERCENT:               7.5632327
 MARGIN OF ERROR VALUE:                 2,501,123
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  30,568,374 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   34,741,384 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  35,570,620 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   30,049,897 (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