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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:44:09                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              156/Martin                                                VRSN:      W
                                                        058-909/Sands ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           D3              10,638,846        0.9863            10,786,623              17            1,527         .010708580
      2           G1              19,253,400        1.0471            18,387,356               9               52         .008310332
      3           G1              19,608,767        1.0593            18,511,061               5               10         .004096753
      4           G1              21,953,633        0.9794            22,415,390               3                4         .000071419
  RANDOM TOTALS:                  71,454,646                          70,100,430              34            1,593
  CATG J  EXCEPTION VALUES:        1,522,494                           1,634,633
  CATG D1 EXCEPTION VALUES:        7,736,870                          11,050,081
  CATG G1 EXCEPTION VALUES:       34,606,893                          33,988,173
 TOTAL TEST VALUES (4):          115,320,903                         116,773,317
 MARGIN OF ERROR PERCENT:          5.0000001
 MARGIN OF ERROR VALUE:            5,838,666
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            110,934,651 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             115,320,903 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            122,611,983 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             127,942,626 (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