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DATE: 01/27/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:58:59                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              031/Cameron                                               VRSN:      W
                                                        031-901/Brownsville ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              595,846,355        0.8270           720,491,360              44           14,899         .101648517
      2           A              595,794,637        0.9843           605,297,813              50            8,814         .039828638
      3           A              595,723,422        1.0120           588,659,508              49            6,044         .013210024
      4           A              595,627,161        0.9734           611,903,802              45            3,294         .049976394
      5           C               58,800,629        0.9817            59,896,739              10            4,155         .031646988
      6           C               58,773,281        0.9462            62,115,072               7            1,768         .005474529
      7           C               58,913,052        0.9429            62,480,700               7              538         .026619274
      8           C               58,644,379        0.9840            59,597,946               7              105         .042812163
      9           F1             205,431,870        0.9991           205,616,925               8            1,096         .113166589
     10           F1             205,818,594        0.9424           218,398,338               7              340         .002137898
     11           F1             204,594,936        0.9766           209,497,170               7              119         .000912447
     12           F1             204,670,746        0.9615           212,866,090               6               30         .003380274
     13           L1              73,835,514        1.0230            72,175,478               7            1,067         .006664102
     14           L1              74,171,292        0.9953            74,521,543               7              249         .005951099
     15           L1              73,571,395        1.0415            70,639,842               6               71         .000854628
     16           L1              73,271,843        0.9795            74,805,353               5               13         .000520200
  RANDOM TOTALS:               3,733,489,106                       3,908,963,679             272           42,602
  CATG D1 EXCEPTION VALUES:        5,037,706                           4,404,550
 TOTAL TEST VALUES (4):        3,738,526,812                       3,913,368,229
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          195,668,411
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          3,717,699,818 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           3,738,526,812 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          4,109,036,640 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           3,854,819,206 (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