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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     20:02                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        157-901-157 Mason

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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         10,742,885     .8671      12,389,442        6
  2      A  - Single-family Residences         10,770,002     .9332      11,540,937        7
  3      A  - Single-family Residences         10,738,365     .8568      12,533,106        7
  4      A  - Single-family Residences         10,693,170     .9296      11,502,980        7
  5      D  - Rural Real                       61,323,210     .7946      77,174,943       11
  6      F  - Commercial Real                   2,857,989     .9390       3,043,652        7
  7      F  - Commercial Real                   2,866,364     .8454       3,390,542        6
  8      F  - Commercial Real                   2,889,093     .9888       2,921,817        5
  9      F  - Commercial Real                   2,753,910     .9506       2,897,023        4

Random Totals:                                115,634,988               137,394,442       60
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      36,859,240                35,464,554
 Other Exception Values:                                0                         0
Exception Totals(3):                           36,859,240                35,464,554
Test Values(4):                               152,494,228               172,858,996

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      8,642,950
Confidence Interval Values:
  Local Test Value:                                       152,494,228  (Outside of ConfidenceInterval Limits)
  State Lower Limit:                                      164,216,046  (State Test Value Minus Margin of Error Value)
  State Upper Limit:                                      181,501,946  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       151,113,747  (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.