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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:59                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        122-901-122 Ft Davis

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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         12,559,947     .9197      13,656,570       10
  2      A  - Single-family Residences         12,517,693     .9857      12,699,293        8
  3      A  - Single-family Residences         12,633,891     .9653      13,088,046        9
  4      A  - Single-family Residences         12,475,439    1.0049      12,414,607        9
  5      C  - Vacant Lots                       2,119,493    1.0302       2,057,361        9
  6      C  - Vacant Lots                       2,506,157     .8204       3,054,799        7
  7      C  - Vacant Lots                       1,761,470    1.0828       1,626,773       10
  8      C  - Vacant Lots                       2,098,011     .9781       2,144,986        9
  9      D  - Rural Real                       15,180,280    1.0045      15,112,275       14
 10      F  - Commercial Real                   2,232,410     .9342       2,389,649        7
 11      F  - Commercial Real                   2,296,004     .9509       2,414,559        6
 12      F  - Commercial Real                   2,497,224     .9960       2,507,253        7

Random Totals:                                 80,878,019                83,166,171      105
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      12,015,602                12,769,585
 Other Exception Values:                        1,878,400                 1,989,156
Exception Totals(3):                           13,894,002                14,758,741
Test Values(4):                                94,772,021                97,924,912

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      4,896,246
Confidence Interval Values:
  State Lower Limit:                                       93,028,666  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        94,772,021  (Within Confidence Interval Limits)
  State Upper Limit:                                      102,821,158  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       105,064,373  (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.