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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     17:20                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        027-904-027 Marble Falls

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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        249,758,558     .9760     255,900,162       58
  2      A  - Single-family Residences        249,863,720     .9865     253,283,041       32
  3      A  - Single-family Residences        249,863,720    1.0063     248,299,434       26
  4      A  - Single-family Residences        249,548,235    1.0000     249,548,235       10
  5      C  - Vacant Lots                      31,342,815     .9950      31,500,317       48
  6      C  - Vacant Lots                      31,541,522     .8754      36,030,982       14
  7      C  - Vacant Lots                      33,780,295    1.0103      33,435,905        6
  8      C  - Vacant Lots                      27,395,157     .9933      27,579,943        6
  9      D  - Rural Real                      173,155,864     .9922     174,517,097       27
 10      F  - Commercial Real                  37,558,196     .9800      38,324,690        7
 11      F  - Commercial Real                  37,668,430     .9952      37,850,111        7
 12      F  - Commercial Real                  37,196,000     .9654      38,529,107        6
 13      F  - Commercial Real                  37,196,000     .9605      38,725,664        5

Random Totals:                              1,445,868,512             1,463,524,688      252
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                      10,632,598                11,345,851
 Other Exception Values:                                0                         0
Exception Totals(3):                           10,632,598                11,345,851
Test Values(4):                             1,456,501,110             1,474,870,539

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     73,743,527
Confidence Interval Values:
  State Lower Limit:                                    1,401,127,012  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     1,456,501,110  (Within Confidence Interval Limits)
  State Upper Limit:                                    1,548,614,066  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     1,490,272,495  (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.