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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
                                                        043-901-043 Allen

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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        693,658,562     .9895     701,019,264      107
  2      A  - Single-family Residences        692,490,787     .9877     701,114,495      107
  3      A  - Single-family Residences        692,782,731    1.0056     688,924,752      106
  4      A  - Single-family Residences        693,074,674     .9952     696,417,478      107
  5      F  - Commercial Real                 121,311,432     .9706     124,986,021        8
  6      F  - Commercial Real                 122,930,942     .9353     131,434,772        6
  7      F  - Commercial Real                 124,348,013     .9895     125,667,522        6
  8      F  - Commercial Real                 112,404,126     .9966     112,787,604        3
  9      L  - Commercial Personal              57,573,629     .8875      64,871,695       10
 10      L  - Commercial Personal              58,535,112     .9329      62,745,323        8
 11      L  - Commercial Personal              58,227,438     .8292      70,221,223        8
 12      L  - Commercial Personal              55,035,313     .9473      58,097,026        4

Random Totals:                              3,482,372,759             3,538,287,175      480
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       1,849,688                 1,658,445
 Other Exception Values:                       45,003,201                50,958,908
Exception Totals(3):                           46,852,889                52,617,353
Test Values(4):                             3,529,225,648             3,590,904,528

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    179,545,226
Confidence Interval Values:
  State Lower Limit:                                    3,411,359,302  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     3,529,225,648  (Within Confidence Interval Limits)
  State Upper Limit:                                    3,770,449,754  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     4,065,594,633  (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.