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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     19:42                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        136-901-136 Brackettville

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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         12,385,542     .9753      12,699,213       15
  2      A  - Single-family Residences         12,380,329     .9703      12,759,280       16
  3      A  - Single-family Residences         12,432,457     .9952      12,492,421       15
  4      A  - Single-family Residences         12,322,989     .9746      12,644,150       15
  5      D  - Rural Real                       14,182,742     .9934      14,276,970       24
  6      F  - Commercial Real                   1,806,688    1.0367       1,742,730        6
  7      F  - Commercial Real                   1,900,651     .9830       1,933,521        5
  8      F  - Commercial Real                   2,009,128    1.0553       1,903,845        4

Random Totals:                                 69,420,526                70,452,130      100
 Cat J Exception Values:                       19,261,620                19,919,253
 Cat D1 Exception Values:                      28,249,022                28,848,461
 Other Exception Values:                        1,416,346                 1,394,316
Exception Totals(3):                           48,926,988                50,162,030
Test Values(4):                               118,347,514               120,614,160

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      6,030,708
Confidence Interval Values:
  State Lower Limit:                                      114,583,452  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       118,347,514  (Within Confidence Interval Limits)
  State Upper Limit:                                      126,644,868  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       114,340,351  (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.