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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     18:08                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        064-903-064 Carrizo Springs 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         16,102,536     .9590      16,790,966       15
  2      A  - Single-family Residences         16,088,981    1.0357      15,534,403       15
  3      A  - Single-family Residences         16,122,867     .9809      16,436,810       15
  4      A  - Single-family Residences         16,068,650    1.0143      15,842,108       15
  5      D  - Rural Real                       37,433,965     .8725      42,904,258       20
  6      F  - Commercial Real                   4,826,481    1.0729       4,498,538        7
  7      F  - Commercial Real                   4,907,804     .9621       5,101,137        7
  8      F  - Commercial Real                   4,859,010    1.0025       4,846,893        6
  9      F  - Commercial Real                   4,734,994     .9881       4,792,019        4
 10      G  - Oil, Gas, Minerals               31,752,233    1.1134      28,518,262       25
 11      L  - Commercial Personal               3,583,771     .9861       3,634,288        9
 12      L  - Commercial Personal               3,615,156    1.0066       3,591,452        6
 13      L  - Commercial Personal               3,652,518    1.0482       3,484,562        5
 14      L  - Commercial Personal               3,349,138     .9834       3,405,672        2

Random Totals:                                167,098,104               169,381,368      151
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      52,764,611                60,641,783
 Other Exception Values:                                0                         0
Exception Totals(3):                           52,764,611                60,641,783
Test Values(4):                               219,862,715               230,023,151

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     11,501,158
Confidence Interval Values:
  State Lower Limit:                                      218,521,993  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       219,862,715  (Within Confidence Interval Limits)
  State Upper Limit:                                      241,524,309  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       241,161,694  (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.