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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     16:13                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        178-908-178 Port Aransas

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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        123,062,374     .7638     161,118,583       37
  2      A  - Single-family Residences        123,062,374     .8635     142,515,778       29
  3      A  - Single-family Residences        123,010,580     .9176     134,056,866       39
  4      A  - Single-family Residences        122,906,993     .9231     133,145,914       16
  5      C  - Vacant Lots                      13,923,326     .9246      15,058,756       13
  6      C  - Vacant Lots                      13,911,606     .9018      15,426,487       21
  7      C  - Vacant Lots                      13,894,026     .9165      15,159,876        9
  8      C  - Vacant Lots                      13,929,186     .9346      14,903,901        9
  9      F  - Commercial Real                  13,858,921     .8382      16,534,146        7
 10      F  - Commercial Real                  13,882,223     .9217      15,061,542       12
 11      F  - Commercial Real                  13,818,142     .8200      16,851,393        6
 12      F  - Commercial Real                  13,823,968     .9600      14,399,967        7
 13      G  - Oil, Gas, Minerals               17,224,008    1.0218      16,856,536        5

Random Totals:                                620,307,727               711,089,745      210
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                         138,860                   121,528
 Other Exception Values:                       29,660,645                29,422,873
Exception Totals(3):                           29,799,505                29,544,401
Test Values(4):                               650,107,232               740,634,146

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     37,031,707
Confidence Interval Values:
  Local Test Value:                                       650,107,232  (Outside of ConfidenceInterval Limits)
  State Lower Limit:                                      703,602,439  (State Test Value Minus Margin of Error Value)
  State Upper Limit:                                      777,665,853  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       815,914,615  (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.