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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:55:43                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              034/Cass                                                  VRSN:      P
                                                        034-902/Avinger ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                4,422,913        0.9379             4,715,762               17              148
           2           A                4,492,919        0.9011             4,986,038               15               73
           3           A                4,484,005        0.8347             5,371,996               14               42
           4           A                4,365,105        1.0746             4,062,074               12               23
           5           D3               9,771,710        1.0494             9,311,711               20            1,047
  RANDOM TOTALS:                       27,536,652                          28,447,581               78            1,333
  CATG J  EXCEPTION VALUES:             1,966,460                           1,981,779
  CATG D1 EXCEPTION VALUES:             4,258,800                           2,890,668
 TOTAL TEST VALUES (4):                33,761,912                          33,320,028
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 1,666,001
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  31,654,027 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   33,761,912 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  34,986,029 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   32,373,820 (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