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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:33                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        102-901-102 Karnack

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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         13,351,490     .9579      13,938,292        8
  2      A  - Single-family Residences         13,351,490    1.0332      12,922,464        8
  3      A  - Single-family Residences         13,300,980     .9018      14,749,368        8
  4      A  - Single-family Residences         13,306,593    1.0270      12,956,760        8
  5      D  - Rural Real                       10,536,570     .9809      10,741,737       10
  6      G  - Oil, Gas, Minerals                3,937,872    1.0010       3,933,938       12

Random Totals:                                 67,784,995                69,242,559       54
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      12,048,440                10,069,164
 Other Exception Values:                        1,266,928                 1,386,228
Exception Totals(3):                           13,315,368                11,455,392
Test Values(4):                                81,100,363                80,697,951

Margin of Error Percent:                                    5.6366698
Margin of Error Value:                                      4,548,677
Confidence Interval Values:
  State Lower Limit:                                       76,149,274  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        81,100,363  (Within Confidence Interval Limits)
  State Upper Limit:                                       85,246,628  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        89,669,641  (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.