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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     15:42                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        152-901-152 Lubbock

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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        930,061,083     .9483     980,766,723       65
  2      A  - Single-family Residences        930,061,083     .9645     964,293,502       65
  3      A  - Single-family Residences        930,061,083     .9527     976,237,098       65
  4      A  - Single-family Residences        930,061,083     .9540     974,906,796       65
  5      B  - Multi-family Residences         109,247,874     .8711     125,413,700       48
  6      B  - Multi-family Residences         111,087,063     .7940     139,908,140       15
  7      B  - Multi-family Residences         110,121,489     .9844     111,866,608        6
  8      B  - Multi-family Residences         106,397,129     .9824     108,303,266        5
  9      F  - Commercial Real                 317,396,178     .9984     317,904,826       52
 10      F  - Commercial Real                 317,262,594     .9253     342,875,385       21
 11      F  - Commercial Real                 319,800,694    1.0033     318,748,823        9
 12      F  - Commercial Real                 314,590,909    1.0133     310,461,767        5
 13      L  - Commercial Personal             184,372,005     .9925     185,765,244        7
 14      L  - Commercial Personal             184,915,188    1.0002     184,878,212        7
 15      L  - Commercial Personal             184,759,993    1.0439     176,990,126        7
 16      L  - Commercial Personal             183,208,040    1.0032     182,623,644        6

Random Totals:                              6,163,403,488             6,401,943,860      448
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       1,937,613                 1,356,107
 Other Exception Values:                                0                         0
Exception Totals(3):                            1,937,613                 1,356,107
Test Values(4):                             6,165,341,101             6,403,299,967

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    320,164,998
Confidence Interval Values:
  State Lower Limit:                                    6,083,134,969  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     6,165,341,101  (Within Confidence Interval Limits)
  State Upper Limit:                                    6,723,464,965  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     6,193,021,011  (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.