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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     18:11                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        069-901-069 Rocksprings

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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          2,930,868     .9332       3,140,664        7
  2      A  - Single-family Residences          2,923,498     .9217       3,171,854        8
  3      A  - Single-family Residences          2,912,442     .9045       3,219,947        8
  4      A  - Single-family Residences          2,911,214     .8373       3,476,907        7
  5      D  - Rural Real                       34,884,255     .9358      37,277,468       20
  6      G  - Oil, Gas, Minerals               68,965,220     .9774      70,559,873       37

Random Totals:                                115,527,497               120,846,713       87
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      33,016,708                32,229,312
 Other Exception Values:                                0                         0
Exception Totals(3):                           33,016,708                32,229,312
Test Values(4):                               148,544,205               153,076,025

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      7,653,801
Confidence Interval Values:
  State Lower Limit:                                      145,422,224  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       148,544,205  (Within Confidence Interval Limits)
  State Upper Limit:                                      160,729,826  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       177,053,635  (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.