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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     13:27                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        046-902-046 Comal

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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        771,030,823    1.0198     756,060,819       45
  2      A  - Single-family Residences        771,030,823     .9936     775,997,205       49
  3      A  - Single-family Residences        771,030,823     .9990     771,802,626       44
  4      A  - Single-family Residences        771,030,823     .9898     778,976,382       44
  5      C  - Vacant Lots                     107,551,146    1.1146      96,493,043       36
  6      C  - Vacant Lots                     107,551,146    1.0115     106,328,370       41
  7      C  - Vacant Lots                     107,460,615     .9990     107,568,183       30
  8      C  - Vacant Lots                     107,415,349     .9881     108,708,986       31
  9      D  - Rural Real                      240,826,660     .9780     246,244,029       12
 10      F  - Commercial Real                  86,082,924     .8047     106,975,176        7
 11      F  - Commercial Real                  86,046,694     .9002      95,586,196        8
 12      F  - Commercial Real                  86,662,607     .9991      86,740,674        5
 13      F  - Commercial Real                  85,430,781     .9204      92,819,188        7
 14      L  - Commercial Personal              51,030,029     .9495      53,744,106       11
 15      L  - Commercial Personal              51,008,552    1.0869      46,930,308        7
 16      L  - Commercial Personal              52,490,485    1.0582      49,603,558        7
 17      L  - Commercial Personal              49,526,619    1.0527      47,047,230        4

Random Totals:                              4,303,206,899             4,327,626,079      388
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      15,346,040                16,009,419
 Other Exception Values:                                0                         0
Exception Totals(3):                           15,346,040                16,009,419
Test Values(4):                             4,318,552,939             4,343,635,498

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    217,181,775
Confidence Interval Values:
  State Lower Limit:                                    4,126,453,723  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     4,318,552,939  (Within Confidence Interval Limits)
  State Upper Limit:                                    4,560,817,273  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     4,648,199,611  (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.