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Date:   1/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:      9:23                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        233-901-233 San Felipe-Del Rio CISD

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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        149,813,011     .9321     160,726,329       20
  2      A  - Single-family Residences        149,686,906     .9719     154,014,720       36
  3      A  - Single-family Residences        149,813,011     .9830     152,403,877       50
  4      A  - Single-family Residences        149,686,906     .9962     150,257,886       59
  5      F  - Commercial Real                  37,137,373     .9443      39,327,939        8
  6      F  - Commercial Real                  37,059,255    1.0054      36,860,210        7
  7      F  - Commercial Real                  39,621,531     .9953      39,808,632        6
  8      G  - Oil, Gas, Minerals               38,646,520     .9418      41,034,742       12
  9      L  - Commercial Personal              25,691,183     .9604      26,750,503        7
 10      L  - Commercial Personal              25,841,865    1.1259      22,952,185        8
 11      L  - Commercial Personal              25,701,946    1.0113      25,414,759        6
 12      L  - Commercial Personal              25,023,880    1.0349      24,179,998        4

Random Totals:                                853,723,387               873,731,780      223
 Cat J Exception Values:                       41,076,233                43,527,006
 Cat D1 Exception Values:                       8,350,101                12,396,971
 Other Exception Values:                       32,181,280                33,477,598
Exception Totals(3):                           81,607,614                89,401,575
Test Values(4):                               935,331,001               963,133,355

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     48,156,668
Confidence Interval Values:
  State Lower Limit:                                      914,976,687  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       935,331,001  (Within Confidence Interval Limits)
  State Upper Limit:                                    1,011,290,023  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       931,323,933  (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.