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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     14:31                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        101-912-101 Houston

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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      9,866,308,227     .9793  10,074,857,783       50
  2      A  - Single-family Residences      9,853,856,008     .9752  10,104,446,276       51
  3      A  - Single-family Residences      9,853,856,008     .9560  10,307,380,762       49
  4      A  - Single-family Residences      9,858,006,748    1.0138   9,723,818,059       50
  5      B  - Multi-family Residences       1,451,151,465     .8709   1,666,266,466       35
  6      B  - Multi-family Residences       1,452,373,487     .9132   1,590,422,128        8
  7      B  - Multi-family Residences       1,465,815,732     .9632   1,521,818,659        8
  8      B  - Multi-family Residences       1,434,654,164     .9624   1,490,704,659       10
  9      C  - Vacant Lots                     366,057,449     .6311     580,030,818       57
 10      C  - Vacant Lots                     366,057,449     .8251     443,652,223       27
 11      C  - Vacant Lots                     365,749,190     .8552     427,676,789       18
 12      C  - Vacant Lots                     364,824,413     .9469     385,282,937        8
 13      D  - Rural Real                      325,964,920    1.1114     293,292,172       10
 14      F  - Commercial Real               4,476,826,376     .8413   5,321,319,834       44
 15      F  - Commercial Real               4,482,478,934     .9610   4,664,390,150       16
 16      F  - Commercial Real               4,467,405,445     .9379   4,763,200,176        7
 17      F  - Commercial Real               4,473,058,003     .9636   4,642,027,815        6
 18      L  - Commercial Personal           1,932,238,504     .8114   2,381,363,697        9
 19      L  - Commercial Personal           1,932,238,504     .9305   2,076,559,381        9
 20      L  - Commercial Personal           1,933,865,652     .9645   2,005,044,740        9
 21      L  - Commercial Personal           1,929,797,782     .9784   1,972,401,658        7

Random Totals:                             72,652,584,460            76,435,957,182      488
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                         844,440                   802,202
 Other Exception Values:                                0                         0
Exception Totals(3):                              844,440                   802,202
Test Values(4):                            72,653,428,900            76,436,759,384

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                  3,821,837,969
Confidence Interval Values:
  State Lower Limit:                                   72,614,921,415  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                    72,653,428,900  (Within Confidence Interval Limits)
  State Upper Limit:                                   80,258,597,353  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                    71,498,948,629  (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.