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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     17:13                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        243-905-243 Wichita 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        432,226,195    1.0070     429,221,643       50
  2      A  - Single-family Residences        432,226,195     .9722     444,585,677       50
  3      A  - Single-family Residences        432,226,195     .9879     437,520,189       49
  4      A  - Single-family Residences        432,226,195     .9841     439,209,628       49
  5      F  - Commercial Real                 157,778,643     .9929     158,906,882       24
  6      F  - Commercial Real                 158,509,407     .9899     160,126,687        9
  7      F  - Commercial Real                 159,705,203     .9556     167,125,579       11
  8      F  - Commercial Real                 154,988,452     .9991     155,128,067        7
  9      L  - Commercial Personal             112,839,694     .9742     115,828,058        9
 10      L  - Commercial Personal             113,457,083    1.0159     111,681,350        8
 11      L  - Commercial Personal             113,314,608    1.0084     112,370,694        9
 12      L  - Commercial Personal             111,557,425     .9821     113,590,699        6

Random Totals:                              2,811,055,295             2,845,295,153      281
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       1,837,439                 1,546,303
 Other Exception Values:                                0                         0
Exception Totals(3):                            1,837,439                 1,546,303
Test Values(4):                             2,812,892,734             2,846,841,456

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    142,342,073
Confidence Interval Values:
  State Lower Limit:                                    2,704,499,383  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     2,812,892,734  (Within Confidence Interval Limits)
  State Upper Limit:                                    2,989,183,529  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     3,070,990,989  (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.