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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     13:52                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        070-911-070 Red Oak

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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        172,802,120     .9637     179,311,113       18
  2      A  - Single-family Residences        172,656,664    1.0305     167,546,496       14
  3      A  - Single-family Residences        172,729,392    1.0424     165,703,561       13
  4      A  - Single-family Residences        172,729,392    1.0270     168,188,308       15

Random Totals:                                690,917,568               680,749,478       60
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       1,272,780                 1,355,563
 Other Exception Values:                                0                         0
Exception Totals(3):                            1,272,780                 1,355,563
Test Values(4):                               692,190,348               682,105,041

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     34,105,252
Confidence Interval Values:
  State Lower Limit:                                      647,999,789  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       692,190,348  (Within Confidence Interval Limits)
  State Upper Limit:                                      716,210,293  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       786,916,203  (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.