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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     21:55                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        254-901-254 Crystal City

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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         10,647,220     .9519      11,185,230       14
  2      A  - Single-family Residences         10,656,178     .9857      10,810,772       14
  3      A  - Single-family Residences         10,620,344     .9582      11,083,640       14
  4      A  - Single-family Residences         10,633,782     .9898      10,743,364       13
  5      D  - Rural Real                       16,186,402    1.0423      15,529,504       30
  6      F  - Commercial Real                   2,516,245    1.0182       2,471,268        8
  7      F  - Commercial Real                   2,460,417     .9853       2,497,125        7
  8      F  - Commercial Real                   2,634,547    1.0282       2,562,290        5
  9      G  - Oil, Gas, Minerals                9,822,470    1.0153       9,674,451       28

Random Totals:                                 76,177,605                76,557,644      133
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      24,753,850                28,017,132
 Other Exception Values:                        6,690,250                 6,664,579
Exception Totals(3):                           31,444,100                34,681,711
Test Values(4):                               107,621,705               111,239,355

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      5,561,968
Confidence Interval Values:
  State Lower Limit:                                      105,677,387  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       107,621,705  (Within Confidence Interval Limits)
  State Upper Limit:                                      116,801,323  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       128,444,513  (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.