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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:24:44                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              246/Williamson                                            VRSN:      W
                                                        246-904/Georgetown ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              621,480,384        0.9657           643,554,296              59            4,950         .002602235
      2           A              621,511,340        0.9595           647,745,013              59            3,666         .006109579
      3           A              621,284,451        0.9621           645,758,706              59            2,759         .004481600
      4           A              621,321,081        0.9352           664,372,413              59            1,800         .010747792
      5           C               42,916,063        1.0165            42,219,442              26            1,198         .019638850
      6           C               42,957,077        0.9491            45,260,854              11              371         .093631292
      7           C               42,772,715        1.0297            41,539,007              10               71         .008560855
      8           C               42,810,615        1.0081            42,466,635               6               14         .000885386
      9           D3             157,469,673        0.9936           158,483,970              15            2,931         .003038867
     10           F1              97,422,455        0.9066           107,459,139               8              381         .015348159
     11           F1              98,348,005        0.9536           103,133,395               9              136         .008896240
     12           F1              98,842,204        0.9972            99,119,739               7               48         .003159156
     13           F1              94,557,832        0.9945            95,080,776               5               12         .001544670
  RANDOM TOTALS:               3,203,693,895                       3,336,193,385             333           18,337
  CATG D1 EXCEPTION VALUES:        9,227,353                           9,690,513
 TOTAL TEST VALUES (4):        3,212,921,248                       3,345,883,898
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          167,294,195
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          3,178,589,703 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           3,212,921,248 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          3,513,178,093 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           3,418,117,555 (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