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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     17:25                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        031-909-031 Point Isabel

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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        298,804,389     .9704     307,918,785       46
  2      A  - Single-family Residences        304,212,044     .9445     322,087,924       47
  3      A  - Single-family Residences        293,396,734     .9584     306,131,818       48
  4      A  - Single-family Residences        298,427,111     .9530     313,144,922       28
  5      C  - Vacant Lots                      35,499,575     .9573      37,083,020        9
  6      C  - Vacant Lots                      35,499,575     .9889      35,898,043        7
  7      C  - Vacant Lots                      35,589,409     .9924      35,861,960        8
  8      C  - Vacant Lots                      35,349,851    1.0014      35,300,430        7
  9      F  - Commercial Real                  42,629,201    1.0041      42,455,135        7
 10      F  - Commercial Real                  42,343,817    1.0080      42,007,755        7
 11      F  - Commercial Real                  42,450,836     .9767      43,463,536        6
 12      F  - Commercial Real                  42,058,433     .9188      45,775,395        4

Random Totals:                              1,506,260,975             1,567,128,723      224
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       1,497,531                 1,503,528
 Other Exception Values:                                0                         0
Exception Totals(3):                            1,497,531                 1,503,528
Test Values(4):                             1,507,758,506             1,568,632,251

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     78,431,613
Confidence Interval Values:
  State Lower Limit:                                    1,490,200,638  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     1,507,758,506  (Within Confidence Interval Limits)
  State Upper Limit:                                    1,647,063,864  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     1,657,341,078  (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.