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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:33:12                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              005/Archer                                                VRSN:      W
                                                        005-904/Windthorst ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                4,301,073        0.9497             4,528,875               8               92         .016784290
      2           A                4,273,647        0.9310             4,590,383               6               54         .003518916
      3           A                4,172,273        0.9699             4,301,756               7               38         .003620932
      4           A                4,233,117        1.0153             4,169,326               6               22         .001417226
      5           D3              19,022,470        0.9516            19,989,985              20              914         .004896114
  RANDOM TOTALS:                  36,002,580                          37,580,325              47            1,120
  CATG D1 EXCEPTION VALUES:        5,524,130                           5,298,878
 TOTAL TEST VALUES (4):           41,526,710                          42,879,203
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            2,143,960
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             40,735,243 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              41,526,710 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             45,023,163 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              45,506,616 (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