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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:10:40                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              091/Grayson                                               VRSN:      W
                                                        091-907/Tioga ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                7,130,480        1.0060             7,087,952              11              135         .007113915
      2           A                7,126,666        1.0311             6,911,712              10               83         .007746422
      3           A                7,161,887        1.0793             6,635,678              10               62         .003716130
      4           A                7,047,048        0.9877             7,134,806               9               33         .001519942
      5           D3              17,054,574        1.0124            16,845,687              21              699         .041893794
      6           F1               3,184,271        0.9221             3,453,282              21               31         .185459832
  RANDOM TOTALS:                  48,704,926                          48,069,117              82            1,043
  CATG J  EXCEPTION VALUES:        2,152,770                           2,190,844
  CATG D1 EXCEPTION VALUES:        2,380,931                           1,691,140
 TOTAL TEST VALUES (4):           53,238,627                          51,951,101
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            2,597,555
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             49,353,546 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              53,238,627 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             54,548,656 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              50,654,717 (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