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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     16:21                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        186-903-186 Iraan-Sheffield

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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          3,792,710     .8935       4,244,779       10
  2      A  - Single-family Residences          3,795,900    1.0452       3,631,745        9
  3      A  - Single-family Residences          3,802,280     .9304       4,086,715       10
  4      A  - Single-family Residences          3,760,812     .9824       3,828,188       10
  5      G  - Oil, Gas, Minerals              414,574,750     .9094     455,877,227       41

Random Totals:                                429,726,452               471,668,654       80
 Cat J Exception Values:                       11,104,116                11,541,801
 Cat D1 Exception Values:                       3,447,810                 5,092,131
 Other Exception Values:                                0                         0
Exception Totals(3):                           14,551,926                16,633,932
Test Values(4):                               444,278,378               488,302,586

Margin of Error Percent:                                    7.3693734
Margin of Error Value:                                     35,984,841
Confidence Interval Values:
  Local Test Value:                                       444,278,378  (Outside of ConfidenceInterval Limits)
  State Lower Limit:                                      452,317,745  (State Test Value Minus Margin of Error Value)
  State Upper Limit:                                      524,287,427  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       763,114,151  (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.