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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     16:59                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        013-905-013 Skidmore-Tynan

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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          4,768,167     .9974       4,780,597        8
  2      A  - Single-family Residences          4,780,203     .8717       5,483,771        8
  3      A  - Single-family Residences          4,802,268     .9447       5,083,379        8
  4      A  - Single-family Residences          4,701,970     .9594       4,900,949        7
  5      D  - Rural Real                       16,905,190     .8671      19,496,240       20
  6      G  - Oil, Gas, Minerals               15,755,010    1.0162      15,503,848       13

Random Totals:                                 51,712,808                55,248,784       64
 Cat J Exception Values:                        7,085,708                 7,243,864
 Cat D1 Exception Values:                      19,238,750                18,685,880
 Other Exception Values:                                0                         0
Exception Totals(3):                           26,324,458                25,929,744
Test Values(4):                                78,037,266                81,178,528

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      4,058,926
Confidence Interval Values:
  State Lower Limit:                                       77,119,602  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        78,037,266  (Within Confidence Interval Limits)
  State Upper Limit:                                       85,237,454  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        80,434,578  (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.