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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     13:10                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        033-901-033 Groom

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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          2,279,652     .9842       2,316,249       12
  2      A  - Single-family Residences          2,251,001     .9649       2,332,885       11
  3      A  - Single-family Residences          2,298,752     .9303       2,470,979       11
  4      A  - Single-family Residences          2,250,046     .9155       2,457,724        9
  5      D  - Rural Real                        6,772,110     .9522       7,112,067       17
  6      G  - Oil, Gas, Minerals               15,348,420    1.1150      13,765,399       41

Random Totals:                                 31,199,981                30,455,303      101
 Cat J Exception Values:                        2,676,159                 2,627,972
 Cat D1 Exception Values:                      14,725,130                17,119,355
 Other Exception Values:                                0                         0
Exception Totals(3):                           17,401,289                19,747,327
Test Values(4):                                48,601,270                50,202,630

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      2,510,132
Confidence Interval Values:
  State Lower Limit:                                       47,692,498  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        48,601,270  (Within Confidence Interval Limits)
  State Upper Limit:                                       52,712,762  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        52,029,061  (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.