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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:03:53                                       2004 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
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                7,182,478        1.0373             6,924,205               17              137
           2           A                7,288,394        1.0438             6,982,558               14               78
           3           A                7,246,070        0.9932             7,295,681               15               58
           4           A                7,119,735        1.0431             6,825,554               15               31
           5           D3              14,472,638        0.8678            16,677,389               19              692
  RANDOM TOTALS:                       43,309,315                          44,705,387               80              996
  CATG J  EXCEPTION VALUES:             2,480,400                           2,444,579
  CATG D1 EXCEPTION VALUES:             2,296,662                           1,915,898
 TOTAL TEST VALUES (4):                48,086,377                          49,065,864
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 2,453,293
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  46,612,571 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   48,086,377 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  51,519,157 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   49,235,011 (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