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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:10:50                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              091/Grayson                                               VRSN:      W
                                                        091-913/Pottsboro ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               85,997,774        0.9916            86,726,275              40            1,541         .036481073
      2           A               86,014,312        1.0397            82,729,934              38              772         .023081175
      3           A               86,050,138        0.9968            86,326,382              43              484         .018856063
      4           A               85,759,482        0.9715            88,275,329              18              256         .041440110
      5           D3              44,481,632        1.1023            40,353,472              30            1,740         .034764467
      6           F1              10,615,117        0.9762            10,873,916               8               74         .015413670
      7           F1              10,060,127        1.0184             9,878,365               5               17         .015200473
      8           G1               9,542,280        0.9861             9,676,787               6               30         .003797580
      9           G1               8,398,503        1.0194             8,238,673               4                8         .001196284
     10           G1              10,016,465        1.0789             9,283,961               3                5         .045853813
  RANDOM TOTALS:                 436,935,830                         432,363,094             195            4,927
  CATG D1 EXCEPTION VALUES:        3,571,916                           2,398,791
  CATG F1 EXCEPTION VALUES:       18,888,829                          20,940,216
  CATG G1 EXCEPTION VALUES:        7,449,590                           6,811,248
 TOTAL TEST VALUES (4):          466,846,165                         462,513,349
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           23,125,667
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            439,387,682 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             466,846,165 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            485,639,016 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             494,310,062 (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