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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     17:17                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        024-901-024 Brooks County

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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         11,144,254     .9489      11,744,392        8
  2      A  - Single-family Residences         11,111,463     .9846      11,285,256        7
  3      A  - Single-family Residences         11,120,832     .9290      11,970,756        8
  4      A  - Single-family Residences         11,130,201     .9312      11,952,535        7
  5      D  - Rural Real                       18,568,000     .9549      19,444,968       11
  6      G  - Oil, Gas, Minerals              218,721,537    1.0291     212,536,718       12

Random Totals:                                281,796,287               278,934,625       53
 Cat J Exception Values:                       18,085,042                18,406,910
 Cat D1 Exception Values:                      37,422,240                37,957,874
 Other Exception Values:                       66,431,107                66,802,233
Exception Totals(3):                          121,938,389               123,167,017
Test Values(4):                               403,734,676               402,101,642

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     20,105,082
Confidence Interval Values:
  State Lower Limit:                                      381,996,560  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       403,734,676  (Within Confidence Interval Limits)
  State Upper Limit:                                      422,206,724  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       507,288,802  (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.