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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     12:59                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        020-906-020 Sweeny

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                                                              (1)                         (2)
  (1)                  (1)                        (1)       Stratum         (1)         Sample
Stratum              Category                 Local Value    Ratio      State Value      Size
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  1      A  - Single-family Residences         55,366,493     .9375      59,057,593       16
  2      A  - Single-family Residences         55,366,493     .9469      58,471,320       19
  3      A  - Single-family Residences         55,366,493     .9850      56,209,638       16
  4      A  - Single-family Residences         55,273,283    1.0139      54,515,517       15
  5      D  - Rural Real                       34,407,590     .9507      36,191,848       13

Random Totals:                                255,780,352               264,445,916       79
 Cat J Exception Values:                       10,267,223                11,389,400
 Cat D1 Exception Values:                       3,759,910                 3,908,318
 Other Exception Values:                       95,185,511                94,115,634
Exception Totals(3):                          109,212,644               109,413,352
Test Values(4):                               364,992,996               373,859,268

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     18,692,963
Confidence Interval Values:
  State Lower Limit:                                      355,166,305  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       364,992,996  (Within Confidence Interval Limits)
  State Upper Limit:                                      392,552,231  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     1,520,750,282  (See ISD Summary Worksheet)


Sources:

(1) See Stratified Ratio Detail Report VAL7214.
(2) Number of parcels sampled by staff.
(3) Exception value includes, if tested, D1, the J sample, and any parcels in A,B,C,D,F1,G or L1 marked as exception properties.
(4) Unstudied categories and sub-categories were not included in the test values.
(5) Includes local value of unstudied property categories and sub-categories.