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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     20:00                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        153-903-153 O'Donnell

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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          3,207,541    1.0910       2,940,001        7
  2      A  - Single-family Residences          3,203,510     .9778       3,276,243        8
  3      A  - Single-family Residences          3,229,041     .9639       3,349,975        7
  4      A  - Single-family Residences          3,128,259     .9317       3,357,582        7
  5      D  - Rural Real                        4,982,430     .9802       5,083,075        9
  6      G  - Oil, Gas, Minerals                5,888,450     .9664       6,093,181       12

Random Totals:                                 23,639,231                24,100,057       50
 Cat J Exception Values:                        1,316,280                 1,319,807
 Cat D1 Exception Values:                      22,460,210                20,499,601
 Other Exception Values:                       10,108,850                 9,010,295
Exception Totals(3):                           33,885,340                30,829,703
Test Values(4):                                57,524,571                54,929,760

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      2,746,488
Confidence Interval Values:
  State Lower Limit:                                       52,183,272  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        57,524,571  (Within Confidence Interval Limits)
  State Upper Limit:                                       57,676,248  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        60,713,491  (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.