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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:00:45                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              068/Ector                                                 VRSN:      W
                                                        068-901/Ector County ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              415,424,856        0.9311           446,165,671               25           12,982
           2           A              415,457,816        0.9666           429,813,590               21            7,385
           3           A              415,430,382        0.9796           424,081,648               16            4,920
           4           A              415,441,472        0.9711           427,805,038               22            2,676
           5           F1             152,663,877        0.9799           155,795,364               18            2,221
           6           F1             152,854,476        0.9069           168,546,120               11              625
           7           F1             153,838,286        1.0905           141,071,331               10              163
           8           F1             151,011,825        0.9526           158,525,955                7               26
           9           G1           1,460,391,460        1.0454         1,396,969,064               19            1,034
          10           L1             145,576,367        0.9803           148,501,854                9            1,178
          11           L1             145,912,449        0.9589           152,166,492                9              310
          12           L1             144,879,911        1.0170           142,458,123               10              123
          13           L1             145,358,090        1.0098           143,947,405               10               36
  RANDOM TOTALS:                    4,314,241,267                       4,335,847,655              187           33,679
  CATG D1 EXCEPTION VALUES:             3,862,933                           4,830,249
 TOTAL TEST VALUES (4):             4,318,104,200                       4,340,677,904
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               217,033,895
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               4,123,644,009 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                4,318,104,200 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               4,557,711,799 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                5,029,862,142 (SEE ISD SUMMARY WORKSHEET)

 SOURCES:
 (1) SEE STRATIFIED CATEGORY WORKSHEET REPORTS PTS236, PTS430
 (2) NUMBER OF PARCELS SAMPLED BY STAFF
 (3) TOTAL CATEGORY PARCELS FROM STRATIFICATION REPORT APPRAISAL ROLL, OR SELF-REPORT
 (4) INCLUDES ANY PARCELS IN A, B, C, D3, F1, G1, G2,OR L1 MARKED AS EXCEPTION PROPERTIES
 (5) UNSTUDIED CATEGORIES AND SUB-CATEGORIES WERE NOT INCLUDED IN THE CONFIDENCE INTERVAL VALUES