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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:28:48                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              174/Nacogdoches                                           VRSN:      W
                                                        174-909/Martinsville ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,531,804        1.0090             2,509,221               6               61         .012251237
      2           A                2,470,524        1.0301             2,398,334               6               36         .027901907
      3           A                2,503,546        0.9189             2,724,503               7               26         .021220028
      4           A                2,493,634        1.0137             2,459,933               5               15         .004983566
      5           D3              20,112,160        0.9616            20,915,308              27            1,024         .012723493
  RANDOM TOTALS:                  30,111,668                          31,007,299              51            1,162
  CATG D1 EXCEPTION VALUES:        6,919,180                           6,160,057
 TOTAL TEST VALUES (4):           37,030,848                          37,167,356
 MARGIN OF ERROR PERCENT:          5.0000005
 MARGIN OF ERROR VALUE:            1,858,368
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             35,308,988 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              37,030,848 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             39,025,724 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              31,294,311 (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