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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     19:10                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        108-910-108 Progreso

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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         10,721,798     .8729      12,282,963       15
  2      A  - Single-family Residences         10,726,312     .9468      11,329,016       16
  3      A  - Single-family Residences         10,753,399     .9713      11,071,141       16
  4      A  - Single-family Residences         10,685,682     .9824      10,877,119       16
  5      C  - Vacant Lots                       1,184,480     .9811       1,207,298        8
  6      C  - Vacant Lots                       1,142,142     .9850       1,159,535        8
  7      C  - Vacant Lots                       1,176,111     .8509       1,382,196        8
  8      C  - Vacant Lots                       1,152,480     .9698       1,188,369        6
  9      D  - Rural Real                        2,870,128     .9731       2,949,469       10
 10      F  - Commercial Real                   1,994,072     .9441       2,112,141        6
 11      F  - Commercial Real                   2,006,901    1.0080       1,990,973        5
 12      F  - Commercial Real                   1,868,190     .9733       1,919,439        3

Random Totals:                                 56,281,695                59,469,659      117
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       3,934,346                 3,747,594
 Other Exception Values:                        1,529,706                 1,629,428
Exception Totals(3):                            5,464,052                 5,377,022
Test Values(4):                                61,745,747                64,846,681

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      3,242,334
Confidence Interval Values:
  State Lower Limit:                                       61,604,347  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        61,745,747  (Within Confidence Interval Limits)
  State Upper Limit:                                       68,089,015  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        59,872,495  (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.