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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:41:12                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              043/Collin                                                VRSN:      W
                                                        043-907/McKinney ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A            1,082,742,749        0.9951         1,088,074,313              81            7,518         .003160910
      2           A            1,080,981,711        1.0026         1,078,178,447              79            5,677         .004422159
      3           A            1,081,839,566        0.9773         1,106,967,734              80            4,130         .009142782
      4           A            1,081,724,745        0.9744         1,110,144,443              76            2,335         .006857926
      5           B               65,979,320        0.9640            68,443,278               6               55         .001162295
      6           B               61,536,382        0.8353            73,669,798               4                7         .055205039
      7           B               85,125,563        0.9632            88,377,869               3                5         .000003516
      8           F1             193,811,153        0.9798           197,806,851              11              336         .006086230
      9           F1             194,881,936        0.8791           221,683,467               9               99         .020815360
     10           F1             192,317,699        0.8666           221,922,108               6               38         .027192560
     11           F1             193,285,901        0.9249           208,980,323               5               12         .007732756
     12           L1             172,158,095        0.9676           177,922,794               8              562         .002396445
     13           L1             187,017,564        0.8381           223,144,689               6               40         .024529909
     14           L1             220,797,872        0.9741           226,668,588               5                7         .000496182
  RANDOM TOTALS:               5,894,200,256                       6,091,984,702             379           20,821
  CATG D1 EXCEPTION VALUES:        5,001,839                           4,477,266
  CATG B  EXCEPTION VALUES:       31,735,716                          30,958,114
  CATG L1 EXCEPTION VALUES:      202,787,880                         211,477,237
 TOTAL TEST VALUES (4):        6,133,725,691                       6,338,897,319
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          316,944,866
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          6,021,952,453 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           6,133,725,691 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          6,655,842,185 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           6,614,978,103 (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