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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:52                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        115-902-115 Sierra Blanca

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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          1,052,982     .9445       1,114,857        8
  2      A  - Single-family Residences          1,045,496    1.0347       1,010,434        8
  3      A  - Single-family Residences          1,056,505     .9386       1,125,618        7
  4      A  - Single-family Residences          1,024,357     .9267       1,105,381        9
  5      C  - Vacant Lots                         810,575     .8693         932,446        8
  6      C  - Vacant Lots                         909,251     .9861         922,068        8
  7      C  - Vacant Lots                         714,052     .8713         819,525        8
  8      C  - Vacant Lots                         805,910     .9985         807,121        8
  9      D  - Rural Real                        3,473,854    1.0530       3,299,007       12
 10      F  - Commercial Real                     590,748    1.0221         577,975        7
 11      F  - Commercial Real                     635,162    1.0961         579,475        3
 12      F  - Commercial Real                   1,035,123     .8543       1,211,662        3

Random Totals:                                 13,154,015                13,505,569       89
 Cat J Exception Values:                       14,202,480                13,145,848
 Cat D1 Exception Values:                       4,497,607                 5,524,453
 Other Exception Values:                                0                         0
Exception Totals(3):                           18,700,087                18,670,301
Test Values(4):                                31,854,102                32,175,870

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                      1,608,794
Confidence Interval Values:
  State Lower Limit:                                       30,567,076  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                        31,854,102  (Within Confidence Interval Limits)
  State Upper Limit:                                       33,784,664  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                        41,726,806  (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.