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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     13:24                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        043-912-043 Prosper

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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         79,327,997    1.0126      78,340,902       46
  2      A  - Single-family Residences         79,394,827    1.0121      78,445,635       50
  3      A  - Single-family Residences         79,361,412    1.0196      77,835,830       31
  4      A  - Single-family Residences         79,394,827    1.0140      78,298,646       23
  5      D  - Rural Real                       61,004,333    1.0073      60,562,229       19
  6      F  - Commercial Real                  12,356,652     .9888      12,496,614        7
  7      F  - Commercial Real                  12,740,206    1.0047      12,680,607        7
  8      F  - Commercial Real                  12,195,974     .9869      12,357,862        5

Random Totals:                                415,776,228               411,018,325      188
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       4,539,652                 3,805,865
 Other Exception Values:                        7,007,951                 7,386,460
Exception Totals(3):                           11,547,603                11,192,325
Test Values(4):                               427,323,831               422,210,650

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     21,110,533
Confidence Interval Values:
  State Lower Limit:                                      401,100,117  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                       427,323,831  (Within Confidence Interval Limits)
  State Upper Limit:                                      443,321,183  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                       509,024,336  (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.