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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:28:46                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              174/Nacogdoches                                           VRSN:      W
                                                        174-908/Central Heights ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                7,316,455        0.9951             7,352,482               8              217         .007691525
      2           A                7,277,645        1.0381             7,010,543               8              108         .006170572
      3           A                7,305,614        1.0309             7,086,637               5               60         .012474186
      4           A                7,212,225        1.0673             6,757,449               6               33         .009220065
      5           D3              35,457,230        0.8300            42,719,554              16            1,714         .257908777
      6           G1              15,225,117        0.9946            15,307,779              20               46         .002094101
  RANDOM TOTALS:                  79,794,286                          86,234,444              63            2,178
  CATG D1 EXCEPTION VALUES:        7,777,720                           5,881,533
 TOTAL TEST VALUES (4):           87,572,006                          92,115,977
 MARGIN OF ERROR PERCENT:         11.7751701
 MARGIN OF ERROR VALUE:           10,846,813
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             81,269,164 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              87,572,006 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            102,962,790 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              82,196,142 (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