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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:49:59                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              090/Gray                                                  VRSN:      W
                                                        090-903/McLean ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                8,324,570        0.9619             8,654,299              10              500         .038850628
      2           D3               5,897,070        0.7812             7,548,733              11            1,127         .154731910
      3           G1              19,073,871        0.9230            20,665,082               7              216         .034059052
      4           G1              19,261,186        0.9937            19,383,301               7               93         .004062530
      5           G1              19,161,886        0.9836            19,481,381               6               55         .000859403
      6           G1              18,735,242        1.0244            18,288,991               6               30         .013206525
      7           L1               2,151,903        0.9602             2,241,099               9               79         .005099492
  RANDOM TOTALS:                  92,605,728                          96,262,886              56            2,100
  CATG J  EXCEPTION VALUES:        6,339,186                           5,226,332
  CATG D1 EXCEPTION VALUES:        8,693,060                          10,465,829
 TOTAL TEST VALUES (4):          107,637,974                         111,955,047
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            5,597,752
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            106,357,295 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             107,637,974 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            117,552,799 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             123,529,775 (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