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DATE: 01/27/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:02:58                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              240/Webb                                                  VRSN:      W
                                                        240-903/United ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              684,437,566        0.9607           712,436,313              43            8,666         .004669639
      2           A              684,188,572        0.9582           714,035,245              45            6,035         .005711298
      3           A              684,172,782        0.9695           705,696,526              44            4,356         .004201691
      4           A              684,043,085        0.9817           696,794,423              44            2,302         .003139760
      5           C               66,489,717        0.9508            69,930,287               7            3,914         .014447219
      6           C               66,377,688        0.9336            71,098,638               8            2,441         .008196808
      7           C               66,533,008        0.9384            70,900,477               7              684         .005344673
      8           C               66,257,853        0.9426            70,292,651               9              170         .060751015
      9           D3             172,395,990        0.7620           226,241,457              10            6,402         .126686505
     10           F1             378,480,648        0.9611           393,799,446              13            1,167         .026832392
     11           F1             378,524,332        0.9701           390,191,044               7              391         .005368270
     12           F1             380,559,180        0.9991           380,901,992               7              153         .012792703
     13           F1             374,084,341        0.9387           398,513,200               6               40         .002477592
     14           G1             186,394,450        1.1464           162,591,111               7              856         .033518342
     15           G1             186,319,720        1.0227           182,184,140               7              311         .020940906
     16           G1             186,429,250        0.9652           193,150,901               7              145         .008091945
     17           G1             185,830,350        0.9903           187,650,560               6               60         .002748143
     18           L1             108,940,564        0.9028           120,669,654               7            1,161         .040384857
     19           L1             109,002,211        0.9996           109,045,829               7              265         .000369682
     20           L1             110,461,142        0.9279           119,044,231               6               74         .003554125
     21           L1             107,196,540        1.0648           100,672,934               5               20         .003561878
  RANDOM TOTALS:               5,867,118,989                       6,075,841,059             302           39,613
  CATG D1 EXCEPTION VALUES:       68,175,130                         103,907,428
 TOTAL TEST VALUES (4):        5,935,294,119                       6,179,748,487
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          308,987,424
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          5,870,761,063 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           5,935,294,119 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          6,488,735,911 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           6,541,623,400 (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