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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     12:53                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        016-902-016 Blanco

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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         11,014,944    1.0650      10,342,670        7
  2      A  - Single-family Residences         10,973,343     .9711      11,299,910        8
  3      A  - Single-family Residences         10,991,832    1.0112      10,870,087        8
  4      A  - Single-family Residences         10,922,498     .9861      11,076,461        8
  5      D  - Rural Real                      210,985,921     .9846     214,285,924       52
  6      F  - Commercial Real                   5,303,648    1.0461       5,069,924        7
  7      F  - Commercial Real                   5,063,861    1.0598       4,778,129        6
  8      F  - Commercial Real                   5,340,706    1.0196       5,238,040        6
  9      F  - Commercial Real                   4,987,565     .9405       5,303,099        4

Random Totals:                                275,584,318               278,264,244      106
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      12,552,928                15,316,612
 Other Exception Values:                                0                         0
Exception Totals(3):                           12,552,928                15,316,612
Test Values(4):                               288,137,246               293,580,856

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     14,679,043
Confidence Interval Values:
  State Lower Limit:                                      278,901,813  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       288,137,246  (Within Confidence Interval Limits)
  State Upper Limit:                                      308,259,899  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       298,072,676  (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.