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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:04:59                                       2005 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   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               11,794,928        0.9140            12,904,735              14              537         .065720660
      2           A               11,821,213        0.9802            12,060,001              13              293         .015770167
      3           A               11,751,188        0.9302            12,632,969              13              185         .012373797
      4           A               11,778,204        0.9505            12,391,588              12              111         .019560402
      5           D3              40,883,730        1.0535            38,807,527              51            3,411         .076406119
      6           F1               1,555,342        0.9326             1,667,748              15               66         .055623632
      7           F1               1,601,970        0.8348             1,918,987              12               27         .083791160
      8           F1               1,472,873        0.7681             1,917,554               8               12         .041396375
      9           F1               1,508,072        0.9463             1,593,651               5                7         .023883769
  RANDOM TOTALS:                  94,167,520                          95,894,760             143            4,649
  CATG J  EXCEPTION VALUES:        9,037,616                           9,761,166
  CATG D1 EXCEPTION VALUES:       12,327,970                          12,111,985
 TOTAL TEST VALUES (4):          115,533,106                         117,767,911
 MARGIN OF ERROR PERCENT:          5.0000004
 MARGIN OF ERROR VALUE:            5,888,396
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            111,879,515 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             115,533,106 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            123,656,307 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             111,974,713 (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