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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     16:29                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        199-902-199 Royse City

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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         53,690,711     .8552      62,781,467       13
  2      A  - Single-family Residences         53,758,530     .9686      55,501,270       36
  3      A  - Single-family Residences         53,690,711     .9979      53,803,699       71
  4      A  - Single-family Residences         53,645,497    1.0062      53,314,944       26
  5      C  - Vacant Lots                       8,916,252     .8929       9,985,723        7
  6      C  - Vacant Lots                       7,570,533     .6947      10,897,557        9
  7      C  - Vacant Lots                       8,574,647     .9553       8,975,868        7
  8      C  - Vacant Lots                       7,701,654     .9779       7,875,707       44
  9      D  - Rural Real                       74,029,280     .8538      86,705,645       17
 10      F  - Commercial Real                   5,433,319    1.0136       5,360,417        7
 11      F  - Commercial Real                   5,369,772     .9589       5,599,929        6
 12      F  - Commercial Real                   5,844,109    1.0848       5,387,269        6
 13      F  - Commercial Real                   4,936,286    1.0027       4,922,994        3

Random Totals:                                343,161,301               371,112,489      252
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       3,808,640                 3,515,618
 Other Exception Values:                                0                         0
Exception Totals(3):                            3,808,640                 3,515,618
Test Values(4):                               346,969,941               374,628,107

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     18,731,405
Confidence Interval Values:
  Local Test Value:                                       346,969,941  (Outside of ConfidenceInterval Limits)
  State Lower Limit:                                      355,896,702  (State Test Value Minus Margin of Error Value)
  State Upper Limit:                                      393,359,512  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       387,683,837  (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.