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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:28:52                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              174/Nacogdoches                                           VRSN:      W
                                                        174-911/Douglass ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                8,129,803        0.9676             8,402,029              13              129         .030580805
      2           A                8,011,601        1.0445             7,670,274              10               58         .020317150
      3           A                8,125,796        1.1067             7,342,366               8               38         .017127437
      4           A                7,910,666        1.1361             6,963,001              11               24         .008826569
      5           D3              25,502,750        0.9199            27,723,394              21            1,216         .050284630
      6           G1              10,168,342        0.9748            10,431,208               7               31         .003712191
      7           G1              10,292,542        0.9907            10,389,161              12               14         .002270108
  RANDOM TOTALS:                  78,141,500                          78,921,433              82            1,510
  CATG J  EXCEPTION VALUES:        2,942,652                           3,254,826
  CATG D1 EXCEPTION VALUES:        9,893,720                           8,956,770
  CATG G1 EXCEPTION VALUES:       26,231,460                          25,423,671
 TOTAL TEST VALUES (4):          117,209,332                         116,556,700
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            5,827,835
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            110,728,865 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             117,209,332 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            122,384,535 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             112,913,467 (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