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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:01:46                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              138/Knox                                                  VRSN:      W
                                                        138-902/Knox City-O'Brien CISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                3,097,289        1.3334             2,322,851              15              232         .066450168
      2           A                3,113,639        0.9941             3,132,118              16              139         .039792981
      3           A                3,084,449        0.9708             3,177,224              15               88         .021431429
      4           A                3,076,707        0.9192             3,347,157              13               53         .003911496
      5           D3               3,530,045        0.9139             3,862,616              17              966         .031275696
      6           G1               2,965,490        1.1250             2,635,991               5               15         .026819387
      7           G1               3,171,999        1.0922             2,904,229               3                5         .052077235
      8           L1               1,188,252        0.9893             1,201,104               7               95         .029709171
      9           L1               1,144,878        0.9871             1,159,840               6               36         .005897159
     10           L1               1,467,378        0.9426             1,556,735               7               18         .020513521
  RANDOM TOTALS:                  25,840,126                          25,299,865             104            1,647
  CATG J  EXCEPTION VALUES:        1,751,418                           1,778,947
  CATG D1 EXCEPTION VALUES:       11,308,290                          11,938,113
  CATG G1 EXCEPTION VALUES:        8,850,016                           8,945,212
  CATG L1 EXCEPTION VALUES:        1,565,664                           1,577,340
 TOTAL TEST VALUES (4):           49,315,514                          49,539,477
 MARGIN OF ERROR PERCENT:          5.0000003
 MARGIN OF ERROR VALUE:            2,476,974
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             47,062,503 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              49,315,514 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             52,016,451 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              54,351,563 (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