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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:55:37                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              109/Hill                                                  VRSN:      W
                                                        109-905/Hubbard ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                7,490,953        0.8138             9,204,907              10              242         .080523583
      2           A                7,499,128        0.9861             7,604,835               9              132         .060034199
      3           A                7,501,727        1.0142             7,396,694              10               88         .040806551
      4           A                7,381,944        1.0072             7,329,174              10               51         .012789517
      5           D3              16,259,265        0.9641            16,864,708              21            1,078         .276874918
      6           F1               1,250,059        0.9884             1,264,730              10               31         .000869694
      7           F1               1,255,863        0.9784             1,283,589               7               12         .002426669
      8           F1               1,324,726        0.8958             1,478,819               4                6         .010884934
      9           L1                 740,311        1.0294               719,167              10               40         .005003160
     10           L1                 816,851        1.0206               800,364               6               11         .001109607
     11           L1                 964,975        0.9981               966,812               3                4         .000049865
  RANDOM TOTALS:                  52,485,802                          54,913,799             100            1,695
  CATG D1 EXCEPTION VALUES:        3,561,639                           2,793,447
  CATG F1 EXCEPTION VALUES:          845,590                             828,438
  CATG L1 EXCEPTION VALUES:          532,500                             532,500
 TOTAL TEST VALUES (4):           57,425,531                          59,068,184
 MARGIN OF ERROR PERCENT:          7.4732770
 MARGIN OF ERROR VALUE:            4,414,329
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             54,653,855 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              57,425,531 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             63,482,513 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              49,008,214 (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