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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     20:13                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        166-904-166 Rockdale

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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         32,889,764     .8909      36,917,459       19
  2      A  - Single-family Residences         32,903,618     .9131      36,035,065       11
  3      A  - Single-family Residences         32,945,181     .8960      36,769,175       14
  4      A  - Single-family Residences         32,875,910    1.0572      31,097,153       11
  5      D  - Rural Real                       58,169,804    1.0236      56,828,648       12
  6      F  - Commercial Real                   7,101,300    1.1199       6,341,013        7
  7      F  - Commercial Real                   7,220,600    1.0576       6,827,345        9
  8      F  - Commercial Real                   7,175,863     .9129       7,860,514        6
  9      F  - Commercial Real                   6,844,807     .9735       7,031,132        4

Random Totals:                                218,126,847               225,707,504       93
 Cat J Exception Values:                       23,514,914                24,046,923
 Cat D1 Exception Values:                      11,437,220                11,542,239
 Other Exception Values:                                0                         0
Exception Totals(3):                           34,952,134                35,589,162
Test Values(4):                               253,078,981               261,296,666

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     13,064,833
Confidence Interval Values:
  State Lower Limit:                                      248,231,833  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       253,078,981  (Within Confidence Interval Limits)
  State Upper Limit:                                      274,361,499  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       558,900,054  (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.