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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     16:13                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        178-905-178 Driscoll

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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          2,950,647     .8359       3,529,904        7
  2      A  - Single-family Residences          2,988,029     .8528       3,503,786        8
  3      A  - Single-family Residences          2,983,045     .9982       2,988,424        7
  4      A  - Single-family Residences          2,921,988     .9495       3,077,397        7
  5      D  - Rural Real                        1,619,109     .9879       1,638,940       12
  6      G  - Oil, Gas, Minerals               30,086,399    1.0317      29,161,965       21

Random Totals:                                 43,549,217                43,900,416       62
 Cat J Exception Values:                        3,974,721                 4,047,593
 Cat D1 Exception Values:                       8,200,632                 8,825,799
 Other Exception Values:                       11,802,151                10,056,325
Exception Totals(3):                           23,977,504                22,929,717
Test Values(4):                                67,526,721                66,830,133

Margin of Error Percent:                                    5.3359897
Margin of Error Value:                                      3,566,049
Confidence Interval Values:
  State Lower Limit:                                       63,264,084  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        67,526,721  (Within Confidence Interval Limits)
  State Upper Limit:                                       70,396,182  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        89,452,103  (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.