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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     15:35                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        147-902-147 Groesbeck

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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         30,857,255     .9240      33,395,298       21
  2      A  - Single-family Residences         30,935,243     .9929      31,156,454       19
  3      A  - Single-family Residences         30,909,247     .9719      31,802,909       13
  4      A  - Single-family Residences         30,792,265     .8860      34,754,249       11
  5      D  - Rural Real                       64,421,977    1.0003      64,402,656       48
  6      G  - Oil, Gas, Minerals              138,049,138     .9811     140,708,529       41

Random Totals:                                325,965,125               336,220,095      153
 Cat J Exception Values:                       35,431,304                38,162,005
 Cat D1 Exception Values:                      13,280,070                13,621,135
 Other Exception Values:                                0                         0
Exception Totals(3):                           48,711,374                51,783,140
Test Values(4):                               374,676,499               388,003,235

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     19,400,162
Confidence Interval Values:
  State Lower Limit:                                      368,603,073  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       374,676,499  (Within Confidence Interval Limits)
  State Upper Limit:                                      407,403,397  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       816,390,050  (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.