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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:41:31                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              043/Collin                                                VRSN:      W
                                                        043-918/Community ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               49,129,110        1.0311            47,647,280              14              680         .038672585
      2           A               49,584,915        0.9282            53,420,507              24              369         .036308858
      3           A               48,592,875        1.0388            46,777,893              19              269         .004172862
      4           A               48,970,683        1.0097            48,500,231              32              200         .004319204
      5           C                4,107,122        0.9241             4,444,456               7              403         .042071692
      6           C                4,461,022        1.0518             4,241,322               7              187         .008996155
      7           C                4,235,657        1.0253             4,131,139               7              120         .040327870
      8           C                3,596,735        1.0074             3,570,315               6               42         .001582298
      9           D3              67,514,330        0.9487            71,165,100              25            2,296         .043645866
  RANDOM TOTALS:                 280,192,449                         283,898,243             141            4,566
  CATG D1 EXCEPTION VALUES:        4,293,254                           3,862,856
 TOTAL TEST VALUES (4):          284,485,703                         287,761,099
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           14,388,055
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            273,373,044 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             284,485,703 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            302,149,154 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             295,315,760 (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