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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:57:29                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              043/Collin                                                VRSN:      W
                                                        043-910/Plano ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A            4,345,630,709        1.0147         4,282,675,381               62           28,088
           2           A            4,345,667,800        1.0099         4,303,067,432               61           20,613
           3           A            4,345,670,739        1.0217         4,253,372,555               62           14,651
           4           A            4,345,641,947        1.0133         4,288,603,520               60            7,360
           5           B              508,197,184        0.9966           509,930,949                7              206
           6           B              513,754,267        0.8801           583,745,332                6               41
           7           B              514,152,717        0.8669           593,093,456                8               29
           8           B              496,043,865        0.9671           512,918,897                9               19
           9           C               71,873,750        0.9304            77,250,376                7              973
          10           C               71,968,657        1.0224            70,391,879                5              174
          11           C               73,131,437        1.0440            70,049,269               11               55
          12           C               70,354,232        0.9836            71,527,279                8               15
          13           D3             292,828,653        0.9789           299,140,518               12           11,092
          14           F1           1,341,722,631        0.9499         1,412,488,295               25              766
          15           F1           1,337,059,046        0.8945         1,494,755,781                8              203
          16           F1           1,358,974,158        0.9843         1,380,650,369                6               81
          17           F1           1,315,953,317        0.9007         1,461,033,992                6               26
          18           L1             484,491,422        0.9585           505,468,359                7            1,964
          19           L1             488,051,522        1.0076           484,370,308                7              209
          20           L1             492,843,697        0.9504           518,564,496                7               57
          21           L1             469,458,634        1.0014           468,802,311                5               15
  RANDOM TOTALS:                   27,283,470,384                      27,641,900,754              389           86,637
  CATG D1 EXCEPTION VALUES:             1,951,806                           1,808,699
 TOTAL TEST VALUES (4):            27,285,422,190                      27,643,709,453
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:             1,382,185,473
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:              26,261,523,980 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:               27,285,422,190 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:              29,025,894,926 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):               27,901,712,003 (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