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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     17:11                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        241-903-241 El Campo

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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         57,987,952     .9504      61,014,259       35
  2      A  - Single-family Residences         58,061,231     .9593      60,524,581       25
  3      A  - Single-family Residences         58,012,378     .8862      65,461,948       15
  4      A  - Single-family Residences         57,914,673     .9901      58,493,761       12
  5      D  - Rural Real                       47,280,854    1.0045      47,069,043       29
  6      F  - Commercial Real                  12,472,552     .8927      13,971,717        7
  7      F  - Commercial Real                  12,535,439     .9932      12,621,264        7
  8      F  - Commercial Real                  12,503,996     .8299      15,066,871        6
  9      F  - Commercial Real                  12,278,651     .9182      13,372,523        5
 10      G  - Oil, Gas, Minerals              155,379,500     .9827     158,114,888       37
 11      L  - Commercial Personal               9,962,439     .9109      10,936,918        7
 12      L  - Commercial Personal              10,117,513     .9624      10,512,794        7
 13      L  - Commercial Personal               9,899,572    1.0000       9,899,572        6
 14      L  - Commercial Personal               9,828,322     .9815      10,013,573        4

Random Totals:                                524,235,072               547,073,712      202
 Cat J Exception Values:                       28,989,508                28,626,894
 Cat D1 Exception Values:                      60,446,500                56,813,634
 Other Exception Values:                                0                         0
Exception Totals(3):                           89,436,008                85,440,528
Test Values(4):                               613,671,080               632,514,240

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     31,625,712
Confidence Interval Values:
  State Lower Limit:                                      600,888,528  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       613,671,080  (Within Confidence Interval Limits)
  State Upper Limit:                                      664,139,952  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       623,294,289  (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.