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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:19                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        094-902-094 Schertz-Cibolo-UnivC

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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        285,332,357     .9946     286,881,517       60
  2      A  - Single-family Residences        285,212,268     .9846     289,673,236       60
  3      A  - Single-family Residences        285,812,715     .9903     288,612,254       61
  4      A  - Single-family Residences        284,611,821    1.0121     281,209,190       59
  5      F  - Commercial Real                  35,791,812    1.0036      35,663,424        7
  6      F  - Commercial Real                  35,313,192    1.0071      35,064,236        7
  7      F  - Commercial Real                  36,868,708    1.0217      36,085,649        6
  8      F  - Commercial Real                  34,071,771     .9464      36,001,449        4
  9      L  - Commercial Personal              20,461,667     .9757      20,971,269        7
 10      L  - Commercial Personal              20,606,907    1.0187      20,228,632        7
 11      L  - Commercial Personal              21,606,495     .9821      22,000,300        6
 12      L  - Commercial Personal              18,479,577    1.0182      18,149,260        3

Random Totals:                              1,364,169,290             1,370,540,416      287
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       2,778,095                 2,751,548
 Other Exception Values:                                0                         0
Exception Totals(3):                            2,778,095                 2,751,548
Test Values(4):                             1,366,947,385             1,373,291,964

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     68,664,598
Confidence Interval Values:
  State Lower Limit:                                    1,304,627,366  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     1,366,947,385  (Within Confidence Interval Limits)
  State Upper Limit:                                    1,441,956,562  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     1,428,322,159  (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.