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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:07:07                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              161/McLennan                                              VRSN:      W
                                                        161-908/Mart ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                8,893,929        0.9637             9,228,940              15              388         .020455188
      2           A                8,893,665        0.9597             9,267,130              16              213         .010846195
      3           A                8,930,393        0.9644             9,260,051              17              135         .027103931
      4           A                8,804,741        0.9708             9,069,573              17               82         .011536993
      5           D3              19,245,482        1.0075            19,102,215              23            1,748         .020333532
      6           F1               1,326,378        0.9300             1,426,213               8               52         .007254756
      7           F1               1,325,437        0.9560             1,386,440               8               18         .017301075
      8           F1               1,583,736        0.9928             1,595,222               5                8         .000119873
      9           L1               1,039,540        1.1055               940,335               6               34         .015447206
     10           L1               1,052,972        1.1169               942,763               4                8         .014583814
     11           L1               1,222,457        0.9785             1,249,317               3                4         .003236616
  RANDOM TOTALS:                  62,318,730                          63,468,199             122            2,690
  CATG J  EXCEPTION VALUES:        9,571,240                           9,401,698
  CATG D1 EXCEPTION VALUES:        8,551,878                           8,534,702
  CATG F1 EXCEPTION VALUES:          938,009                             945,471
  CATG L1 EXCEPTION VALUES:          728,003                             723,336
 TOTAL TEST VALUES (4):           82,107,860                          83,073,406
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            4,153,670
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             78,919,736 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              82,107,860 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             87,227,076 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              68,671,986 (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