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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     21:42                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        243-903-243 Iowa Park CISD

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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         51,715,738     .9597      53,887,400       15
  2      A  - Single-family Residences         51,759,288     .9842      52,590,213       38
  3      A  - Single-family Residences         51,693,963     .9642      53,613,320       45
  4      A  - Single-family Residences         51,715,738     .9860      52,450,039       35
  5      D  - Rural Real                       19,853,585    1.0207      19,450,950       23
  6      G  - Oil, Gas, Minerals               19,049,521     .9981      19,085,784       25
  7      L  - Commercial Personal               4,546,688    1.0123       4,491,443        7
  8      L  - Commercial Personal               4,506,921     .9670       4,660,725        7
  9      L  - Commercial Personal               4,607,285     .9897       4,655,234        6
 10      L  - Commercial Personal               4,340,279     .9953       4,360,775        5

Random Totals:                                263,789,006               269,245,883      206
 Cat J Exception Values:                       17,365,248                17,523,260
 Cat D1 Exception Values:                      11,696,684                10,200,182
 Other Exception Values:                        6,502,165                 6,269,397
Exception Totals(3):                           35,564,097                33,992,839
Test Values(4):                               299,353,103               303,238,722

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     15,161,936
Confidence Interval Values:
  State Lower Limit:                                      288,076,786  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       299,353,103  (Within Confidence Interval Limits)
  State Upper Limit:                                      318,400,658  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       367,453,279  (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.