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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:15                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        091-902-091 Collinsville

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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         11,536,588    1.1136      10,359,723        9
  2      A  - Single-family Residences         11,507,516    1.0132      11,357,596       10
  3      A  - Single-family Residences         11,522,052     .9575      12,033,475        9
  4      A  - Single-family Residences         11,478,444     .9550      12,019,313        9
  5      D  - Rural Real                       19,066,915     .9782      19,491,837       27

Random Totals:                                 65,111,515                65,261,944       64
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       4,099,959                 3,537,873
 Other Exception Values:                                0                         0
Exception Totals(3):                            4,099,959                 3,537,873
Test Values(4):                                69,211,474                68,799,817

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      3,439,991
Confidence Interval Values:
  State Lower Limit:                                       65,359,826  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        69,211,474  (Within Confidence Interval Limits)
  State Upper Limit:                                       72,239,808  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        72,930,199  (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.