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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:57:37                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              043/Collin                                                VRSN:      W
                                                        043-917/Blue Ridge ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                9,538,450        0.9776             9,757,007                7              213
           2           A                9,541,006        1.0461             9,120,549                9              130
           3           A                9,450,770        1.0179             9,284,576                7              102
           4           A                9,543,219        0.9659             9,880,131               11               71
           5           D3              45,138,863        0.9086            49,679,576               15           39,636
  RANDOM TOTALS:                       83,212,308                          87,721,839               49           40,152
  CATG J  EXCEPTION VALUES:             7,236,641                           7,711,436
  CATG D1 EXCEPTION VALUES:             4,179,910                           3,641,192
 TOTAL TEST VALUES (4):                94,628,859                          99,074,467
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 4,953,723
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  94,120,744 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   94,628,859 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 104,028,190 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   90,992,722 (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