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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     21:54                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        252-901-252 Graham

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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         49,073,198     .9965      49,245,557       28
  2      A  - Single-family Residences         49,135,186     .9897      49,646,545       23
  3      A  - Single-family Residences         49,073,198    1.0296      47,662,391       20
  4      A  - Single-family Residences         48,990,549     .9761      50,190,092       14
  5      D  - Rural Real                       44,004,605     .8127      54,146,186       22
  6      F  - Commercial Real                   8,588,517     .8495      10,110,085        9
  7      F  - Commercial Real                   8,610,087     .7829      10,997,684        7
  8      F  - Commercial Real                   8,631,657     .9452       9,132,096        8
  9      F  - Commercial Real                   8,318,890     .9078       9,163,792        4
 10      G  - Oil, Gas, Minerals               51,590,924     .9967      51,761,738       31
 11      L  - Commercial Personal               6,051,080     .9872       6,129,538        9
 12      L  - Commercial Personal               5,995,403    1.0244       5,852,600        9
 13      L  - Commercial Personal               6,311,750     .9977       6,326,300        8

Random Totals:                                344,375,044               360,364,604      192
 Cat J Exception Values:                       28,857,670                29,022,179
 Cat D1 Exception Values:                      19,646,243                22,131,127
 Other Exception Values:                        3,275,370                 3,291,650
Exception Totals(3):                           51,779,283                54,444,956
Test Values(4):                               396,154,327               414,809,560

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     20,740,478
Confidence Interval Values:
  State Lower Limit:                                      394,069,082  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       396,154,327  (Within Confidence Interval Limits)
  State Upper Limit:                                      435,550,038  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       381,220,086  (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.