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Date:   6/27/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     17:32                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        037-901-037 Alto

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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          5,011,264     .8146       6,151,809       10
  2      A  - Single-family Residences          4,986,050    1.0582       4,711,822        8
  3      A  - Single-family Residences          4,975,545     .9975       4,988,015        8
  4      A  - Single-family Residences          4,986,050    1.0116       4,928,875        7
  5      D  - Rural Real                       30,362,950    1.0029      30,275,152       15
  6      G  - Oil, Gas, Minerals               20,607,658    1.0060      20,484,750       12

Random Totals:                                 70,929,517                71,540,423       60
 Cat J Exception Values:                        4,585,585                 4,535,478
 Cat D1 Exception Values:                      22,954,320                21,499,091
 Other Exception Values:                                0                         0
Exception Totals(3):                           27,539,905                26,034,569
Test Values(4):                                98,469,422                97,574,992

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      4,878,750
Confidence Interval Values:
  State Lower Limit:                                       92,696,242  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        98,469,422  (Within Confidence Interval Limits)
  State Upper Limit:                                      102,453,742  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       100,978,985  (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.