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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     16:05                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        170-904-170 Willis

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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        200,057,052     .9920     201,670,415       15
  2      A  - Single-family Residences        200,141,286     .9781     204,622,519       17
  3      A  - Single-family Residences        200,057,052     .9718     205,862,371       17
  4      A  - Single-family Residences        199,972,817     .9413     212,443,235       17
  5      C  - Vacant Lots                      23,926,789    1.1639      20,557,427       10
  6      C  - Vacant Lots                      23,916,706    1.0424      22,943,885       13
  7      C  - Vacant Lots                      23,906,623     .9997      23,913,797        9
  8      C  - Vacant Lots                      23,876,375    1.0122      23,588,594        7
  9      D  - Rural Real                       39,779,745     .9627      41,321,019       10
 10      F  - Commercial Real                  24,001,300     .9521      25,208,802        7
 11      F  - Commercial Real                  23,951,256    1.0118      23,671,927        7
 12      F  - Commercial Real                  24,451,700     .9354      26,140,368        7
 13      L  - Commercial Personal              17,897,707     .9816      18,233,198        7
 14      L  - Commercial Personal              17,725,685     .9555      18,551,214        7
 15      L  - Commercial Personal              17,763,081    1.0001      17,761,305        5

Random Totals:                              1,061,425,174             1,086,490,076      155
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      35,118,948                34,367,613
 Other Exception Values:                       36,698,571                34,529,718
Exception Totals(3):                           71,817,519                68,897,331
Test Values(4):                             1,133,242,693             1,155,387,407

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     57,769,370
Confidence Interval Values:
  State Lower Limit:                                    1,097,618,037  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     1,133,242,693  (Within Confidence Interval Limits)
  State Upper Limit:                                    1,213,156,777  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     1,094,178,660  (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.