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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     19:05                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        129-905-107 Mabank

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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        114,547,141     .8359     137,034,503        8
  2      A  - Single-family Residences        114,595,371     .8924     128,412,563       11
  3      A  - Single-family Residences        114,643,601    1.0012     114,506,194        9
  4      A  - Single-family Residences        114,402,450    1.0147     112,745,097        9
  5      C  - Vacant Lots                       8,234,634     .9696       8,492,816       34
  6      C  - Vacant Lots                       8,048,621     .8258       9,746,453       16
  7      C  - Vacant Lots                       8,213,171     .9748       8,425,493        9
  8      C  - Vacant Lots                       8,059,353    1.0040       8,027,244        8
  9      D  - Rural Real                       60,032,350     .9546      62,887,440       24
 10      F  - Commercial Real                  19,508,053     .9072      21,503,586        8
 11      F  - Commercial Real                  19,688,759    1.0020      19,649,460        7
 12      F  - Commercial Real                  20,009,102     .9553      20,945,360        6
 13      F  - Commercial Real                  18,850,940    1.0116      18,634,777        4
 14      L  - Commercial Personal              10,405,390     .9877      10,534,970        7
 15      L  - Commercial Personal              10,414,108     .9958      10,458,032        7
 16      L  - Commercial Personal              10,566,680    1.0494      10,069,259        6
 17      L  - Commercial Personal              10,039,218     .9983      10,056,314        3

Random Totals:                                670,258,942               712,129,561      176
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       4,464,320                 3,716,686
 Other Exception Values:                                0                         0
Exception Totals(3):                            4,464,320                 3,716,686
Test Values(4):                               674,723,262               715,846,247

Margin of Error Percent:                                    6.3594564
Margin of Error Value:                                     45,523,930
Confidence Interval Values:
  State Lower Limit:                                      670,322,317  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       674,723,262  (Within Confidence Interval Limits)
  State Upper Limit:                                      761,370,177  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       635,829,869  (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.