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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
                                                        101-913-101 Humble

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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      1,272,163,888     .9760   1,303,446,607       50
  2      A  - Single-family Residences      1,268,958,099     .9749   1,301,628,987       50
  3      A  - Single-family Residences      1,266,820,907     .9795   1,293,334,259       50
  4      A  - Single-family Residences      1,267,889,503     .9834   1,289,291,746       49
  5      F  - Commercial Real                 166,917,048     .9712     171,866,812        7
  6      F  - Commercial Real                 169,090,264    1.0133     166,870,881        7
  7      F  - Commercial Real                 170,422,236    1.0038     169,777,083        6
  8      F  - Commercial Real                 159,486,049     .9870     161,586,676        5
  9      L  - Commercial Personal              76,975,640     .9611      80,091,187        7
 10      L  - Commercial Personal              77,267,215     .9620      80,319,350        9
 11      L  - Commercial Personal              76,748,860     .9652      79,516,017        7
 12      L  - Commercial Personal              76,781,257     .9209      83,376,324        6

Random Totals:                              6,049,520,966             6,181,105,929      253
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       7,576,080                 7,551,582
 Other Exception Values:                                0                         0
Exception Totals(3):                            7,576,080                 7,551,582
Test Values(4):                             6,057,097,046             6,188,657,511

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    309,432,876
Confidence Interval Values:
  State Lower Limit:                                    5,879,224,635  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     6,057,097,046  (Within Confidence Interval Limits)
  State Upper Limit:                                    6,498,090,387  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     6,228,163,930  (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.