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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
                                                        043-907-043 McKinney

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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        882,067,229     .9850     895,499,725      107
  2      A  - Single-family Residences        882,067,229    1.0013     880,922,030      107
  3      A  - Single-family Residences        882,067,229     .9924     888,822,278      107
  4      A  - Single-family Residences        882,067,229     .9863     894,319,405      107
  5      F  - Commercial Real                 165,399,983    1.0686     154,781,942       14
  6      F  - Commercial Real                 165,261,573     .8804     187,711,918        7
  7      F  - Commercial Real                 165,261,573     .7861     210,229,707        6
  8      F  - Commercial Real                 161,662,912     .9606     168,293,683        4
  9      L  - Commercial Personal              78,664,180     .9103      86,415,665        8
 10      L  - Commercial Personal              78,460,913     .9210      85,191,002        8
 11      L  - Commercial Personal              81,916,446     .9532      85,938,361        6
 12      L  - Commercial Personal              75,107,014     .8312      90,359,738        5

Random Totals:                              4,500,003,510             4,628,485,454      486
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       5,361,416                 4,521,779
 Other Exception Values:                      162,484,072               166,955,678
Exception Totals(3):                          167,845,488               171,477,457
Test Values(4):                             4,667,848,998             4,799,962,911

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    239,998,146
Confidence Interval Values:
  State Lower Limit:                                    4,559,964,765  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     4,667,848,998  (Within Confidence Interval Limits)
  State Upper Limit:                                    5,039,961,057  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     5,442,104,474  (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.