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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     16:50                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        220-907-220 Keller

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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      1,136,930,884     .9816   1,158,242,547       75
  2      A  - Single-family Residences      1,136,452,378    1.0066   1,129,000,972       75
  3      A  - Single-family Residences      1,135,973,872    1.0069   1,128,189,365       75
  4      A  - Single-family Residences      1,135,495,366     .9818   1,156,544,475       75
  5      F  - Commercial Real                 133,191,074     .9717     137,070,160        7
  6      F  - Commercial Real                 136,669,526     .9178     148,909,922        6
  7      F  - Commercial Real                 139,082,001     .9360     148,591,881        6

Random Totals:                              4,953,795,101             5,006,549,322      319
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                         629,771                   567,531
 Other Exception Values:                      105,794,320               104,701,768
Exception Totals(3):                          106,424,091               105,269,299
Test Values(4):                             5,060,219,192             5,111,818,621

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    255,590,931
Confidence Interval Values:
  State Lower Limit:                                    4,856,227,690  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     5,060,219,192  (Within Confidence Interval Limits)
  State Upper Limit:                                    5,367,409,552  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     5,883,805,105  (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.