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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:25:11                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              246/Williamson                                            VRSN:      W
                                                        246-914/Coupland ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                3,376,046        0.9979             3,383,151               6              164         .004527510
      2           A                3,398,023        0.9905             3,430,614               8               83         .017627433
      3           A                3,406,787        0.9752             3,493,424               8               48         .009364473
      4           A                3,267,038        1.0094             3,236,614               7               26         .005389866
      5           D3              19,276,022        1.0113            19,060,637              23              737         .025298938
  RANDOM TOTALS:                  32,723,916                          32,604,440              52            1,058
  CATG J  EXCEPTION VALUES:        4,733,469                           4,784,962
  CATG D1 EXCEPTION VALUES:        4,072,860                           4,419,554
 TOTAL TEST VALUES (4):           41,530,245                          41,808,956
 MARGIN OF ERROR PERCENT:          5.0000005
 MARGIN OF ERROR VALUE:            2,090,448
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             39,718,508 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              41,530,245 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             43,899,404 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              41,228,943 (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