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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:10                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        087-901-087 Glasscock

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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                       16,840,500     .6802      24,758,159       20
  2      G  - Oil, Gas, Minerals              221,834,535     .9500     233,510,037       41

Random Totals:                                238,675,035               258,268,196       61
 Cat J Exception Values:                        8,122,286                 7,963,234
 Cat D1 Exception Values:                      10,899,980                26,150,418
 Other Exception Values:                       73,276,525                70,483,359
Exception Totals(3):                           92,298,791               104,597,011
Test Values(4):                               330,973,826               362,865,207

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     18,143,260
Confidence Interval Values:
  Local Test Value:                                       330,973,826  (Outside of ConfidenceInterval Limits)
  State Lower Limit:                                      344,721,947  (State Test Value Minus Margin of Error Value)
  State Upper Limit:                                      381,008,467  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       368,250,513  (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.