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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:34:16                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              198/Robertson                                             VRSN:      W
                                                        198-902/Calvert ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                3,926,774        0.7960             4,933,133              15              250         .077303806
      2           A                3,927,869        0.9248             4,247,263              15              121         .135904835
      3           A                3,953,008        0.9618             4,110,010              15               72         .117998184
      4           A                3,860,314        1.0322             3,739,890              15               37         .021524245
      5           D3               7,543,200        1.0151             7,430,992              21              975         .041470359
      6           F1                 699,304        0.8095               863,872               6               44         .028511865
      7           F1                 669,800        0.9306               719,751               5               13         .003610234
      8           F1                 695,727        0.9357               743,536               3                6         .020385323
      9           G1               1,239,342        1.0115             1,225,252               7               10         .021109943
  RANDOM TOTALS:                  26,515,338                          28,013,699             102            1,528
  CATG J  EXCEPTION VALUES:       10,578,268                          10,948,187
  CATG D1 EXCEPTION VALUES:        5,875,840                           6,712,708
  CATG F1 EXCEPTION VALUES:          640,970                             686,926
 TOTAL TEST VALUES (4):           43,610,416                          46,361,520
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            2,318,076
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:              43,610,416 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:             44,043,444 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             48,679,596 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              47,168,166 (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