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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:16:16                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              110/Hockley                                               VRSN:      W
                                                        110-908/Whitharral ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                  803,372        0.8538               940,937               7               41         .033942428
      2           A                  776,296        0.8861               876,082               5               18         .028949500
      3           A                  820,574        0.9114               900,345               6               13         .020076938
      4           A                  732,877        0.9801               747,757               5                7         .009808252
      5           D3               3,569,273        0.9127             3,910,675              29              750         .055831961
      6           G1              23,613,403        1.0684            22,101,650              20               42         .057702105
  RANDOM TOTALS:                  30,315,795                          29,477,446              72              871
  CATG J  EXCEPTION VALUES:          542,400                             460,458
  CATG D1 EXCEPTION VALUES:        9,089,736                           6,584,197
 TOTAL TEST VALUES (4):           39,947,931                          36,522,101
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            1,826,105
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             34,695,996 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             38,348,206 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              39,947,931 (OUTSIDE CONFIDENCE INTERVAL)
 VALUE ASSIGNED (6):              41,259,913 (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