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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:59:35                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              060/Delta                                                 VRSN:      W
                                                        060-902/Cooper ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               11,458,238        1.0254            11,174,408               15              526
           2           A               11,456,946        0.9255            12,379,196               15              294
           3           A               11,502,111        0.8997            12,784,385               15              190
           4           A               11,402,335        0.9890            11,529,156               15              114
           5           D3              38,375,830        0.9727            39,452,894               43            3,360
  RANDOM TOTALS:                       84,195,460                          87,320,039              103            4,484
  CATG J  EXCEPTION VALUES:             5,747,726                           5,955,179
  CATG D1 EXCEPTION VALUES:            11,405,491                          11,260,156
 TOTAL TEST VALUES (4):               101,348,677                         104,535,374
 MARGIN OF ERROR PERCENT:               5.0000003
 MARGIN OF ERROR VALUE:                 5,226,769
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  99,308,605 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  101,348,677 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 109,762,143 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  104,407,591 (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