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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
                                                        043-914-043 Wylie

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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        257,708,127     .9956     258,847,054      104
  2      A  - Single-family Residences        257,599,664    1.0007     257,419,470      106
  3      A  - Single-family Residences        257,491,201    1.0039     256,490,887      107
  4      A  - Single-family Residences        257,708,127    1.0025     257,065,463      106
  5      D  - Rural Real                       53,045,277    1.0092      52,561,709       14
  6      F  - Commercial Real                  31,513,220     .9517      33,112,556        8
  7      F  - Commercial Real                  31,434,273     .9094      34,565,948        7
  8      F  - Commercial Real                  32,447,432     .8632      37,589,703        6

Random Totals:                              1,178,947,321             1,187,652,790      458
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       1,100,999                   930,189
 Other Exception Values:                       25,825,492                25,128,732
Exception Totals(3):                           26,926,491                26,058,921
Test Values(4):                             1,205,873,812             1,213,711,711

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                     60,685,586
Confidence Interval Values:
  State Lower Limit:                                    1,153,026,125  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     1,205,873,812  (Within Confidence Interval Limits)
  State Upper Limit:                                    1,274,397,297  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     1,546,345,780  (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.