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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:05:47                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              237/Waller                                                VRSN:      W
                                                        101-914/Katy ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A            1,940,987,438        0.9666         2,008,056,526               13           17,090
           2           A            1,936,349,490        1.0002         1,935,962,298               11           12,072
           3           A            1,934,777,461        1.0007         1,933,424,064               10            8,763
           4           A            1,937,330,039        1.0121         1,914,168,599                9            5,372
           5           B              100,536,869        0.9869           101,871,384                6               15
           6           B              176,475,584        0.8923           197,776,066                5                9
           7           F1             460,340,429        1.0600           434,283,424               10              485
           8           F1             457,542,071        1.0699           427,649,379                9              107
           9           F1             485,837,768        0.9349           519,668,166                6               31
          10           F1             427,841,773        0.9329           458,614,828                3                5
          11           L1             188,798,955        1.0699           176,464,113                7            1,541
          12           L1             189,467,345        1.0283           184,252,986                7              203
          13           L1             192,838,262        0.9633           200,185,053                8               48
          14           L1             183,779,693        0.9468           194,106,140                5               10
  RANDOM TOTALS:                   10,612,903,177                      10,686,483,026              109           45,751
  CATG D1 EXCEPTION VALUES:             9,617,370                           8,551,355
  CATG B  EXCEPTION VALUES:            82,169,150                          87,238,808
 TOTAL TEST VALUES (4):            10,704,689,697                      10,782,273,189
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               539,113,659
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:              10,243,159,530 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:               10,704,689,697 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:              11,321,386,848 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):               11,371,833,359 (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