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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     19:55                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        148-905-148 Darrouzett

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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      D  - Rural Real                        2,861,869     .8698       3,290,261       10
  2      G  - Oil, Gas, Minerals               59,692,157    1.0401      57,390,786       41

Random Totals:                                 62,554,026                60,681,047       51
 Cat J Exception Values:                        1,117,341                 1,208,866
 Cat D1 Exception Values:                       5,412,124                 6,768,260
 Other Exception Values:                                0                         0
Exception Totals(3):                            6,529,465                 7,977,126
Test Values(4):                                69,083,491                68,658,173

Margin of Error Percent:                                    6.2294739
Margin of Error Value:                                      4,277,043
Confidence Interval Values:
  State Lower Limit:                                       64,381,130  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        69,083,491  (Within Confidence Interval Limits)
  State Upper Limit:                                       72,935,216  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        81,235,653  (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.