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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:01                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        076-903-076 Roby

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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          1,512,280     .9651       1,566,967        9
  2      A  - Single-family Residences          1,505,293     .9190       1,637,968       15
  3      A  - Single-family Residences          1,503,388     .8938       1,682,018        9
  4      A  - Single-family Residences          1,514,185     .8788       1,723,014        8
  5      D  - Rural Real                       12,277,952     .9767      12,570,853       20
  6      G  - Oil, Gas, Minerals                6,225,029    1.0270       6,061,372       18

Random Totals:                                 24,538,127                25,242,192       79
 Cat J Exception Values:                        3,503,639                 3,572,467
 Cat D1 Exception Values:                      13,215,770                15,004,454
 Other Exception Values:                        5,661,711                 5,444,783
Exception Totals(3):                           22,381,120                24,021,704
Test Values(4):                                46,919,247                49,263,896

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      2,463,195
Confidence Interval Values:
  State Lower Limit:                                       46,800,701  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        46,919,247  (Within Confidence Interval Limits)
  State Upper Limit:                                       51,727,091  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        48,223,551  (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.