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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     17:33                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        039-903-039 Petrolia

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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          7,156,478    1.0185       7,026,488        8
  2      A  - Single-family Residences          7,153,463    1.0214       7,003,586        8
  3      A  - Single-family Residences          7,204,710     .9742       7,395,514       10
  4      A  - Single-family Residences          7,132,362     .9994       7,136,644        8
  5      D  - Rural Real                       14,059,460     .9919      14,174,272       15

Random Totals:                                 42,706,473                42,736,504       49
 Cat J Exception Values:                        4,184,729                 4,090,506
 Cat D1 Exception Values:                       8,475,710                 8,556,896
 Other Exception Values:                                0                         0
Exception Totals(3):                           12,660,439                12,647,402
Test Values(4):                                55,366,912                55,383,906

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      2,769,195
Confidence Interval Values:
  State Lower Limit:                                       52,614,711  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        55,366,912  (Within Confidence Interval Limits)
  State Upper Limit:                                       58,153,101  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        57,486,934  (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.