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Date:   1/22/2004                        COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         Page:      1
Time:     15:59                                      2003 Property Value Study                                          Rpt: VAL7000
                                                     Confidence Interval Detail
                                                        165-901-165 Midland

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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        601,588,665     .9424     638,358,091       28
  2      A  - Single-family Residences        601,588,665     .9732     618,155,225       27
  3      A  - Single-family Residences        601,841,966     .9440     637,544,456       28
  4      A  - Single-family Residences        601,335,365     .9762     615,996,072       25
  5      F  - Commercial Real                 163,773,512     .9649     169,731,073       17
  6      F  - Commercial Real                 163,704,612    1.0346     158,229,859       12
  7      F  - Commercial Real                 165,702,690    1.0379     159,651,884        7
  8      F  - Commercial Real                 161,362,038    1.0273     157,073,920       10
  9      G  - Oil, Gas, Minerals              817,346,160     .9729     840,113,228       12
 10      L  - Commercial Personal             116,667,859     .9378     124,405,906       10
 11      L  - Commercial Personal             117,158,679     .9928     118,008,339       11
 12      L  - Commercial Personal             117,011,433    1.0191     114,818,402        8
 13      L  - Commercial Personal             115,440,810    1.0195     113,232,771        7

Random Totals:                              4,344,522,454             4,465,319,226      202
 Cat J Exception Values:                                0                         0
 Cat D1 Exception Values:                       8,364,870                 9,212,113
 Other Exception Values:                                0                         0
Exception Totals(3):                            8,364,870                 9,212,113
Test Values(4):                             4,352,887,324             4,474,531,339

Margin of Error Percent:                                    5.0000000
Margin of Error Value:                                    223,726,567
Confidence Interval Values:
  State Lower Limit:                                    4,250,804,772  (State Test Value Minus Margin of Error Value)
  Local Test Value:                                     4,352,887,324  (Within Confidence Interval Limits)
  State Upper Limit:                                    4,698,257,906  (State Test Value Plus Margin of Error Value)
Value Assigned (5):                                     4,672,550,574  (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.