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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:25:06                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              246/Williamson                                            VRSN:      W
                                                        246-913/Leander ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A            1,423,615,784        0.9819         1,449,858,218             100           10,650         .005261423
      2           A            1,423,616,988        0.9751         1,459,970,247             100            7,894         .007665789
      3           A            1,423,698,335        0.9825         1,449,056,830             100            5,511         .007275696
      4           A            1,423,346,119        0.9620         1,479,569,770             100            2,838         .020009337
      5           B              122,893,107        1.0125           121,375,908               4                9         .006405626
      6           B              120,918,841        0.9849           122,772,709               3                5         .001478053
      7           C              112,056,660        0.9294           120,568,819              33            3,040         .048974814
      8           C              107,074,468        0.9073           118,014,403              52              973         .035627371
      9           C              109,493,167        1.0039           109,067,803              13              282         .008712316
     10           C              108,955,068        1.0394           104,824,964               8               74         .021717201
     11           D3             190,919,460        1.0395           183,664,704              11            1,973         .029655433
     12           F1             145,309,982        1.0361           140,247,063               6              278         .001591576
     13           F1             146,658,379        0.8975           163,407,665               7               97         .039806811
     14           F1             148,847,828        0.9299           160,068,640               6               36         .151093518
     15           F1             140,033,695        1.0216           137,072,920               4               11         .001136864
  RANDOM TOTALS:               7,147,437,881                       7,319,540,663             547           33,671
  CATG D1 EXCEPTION VALUES:        4,674,480                           4,516,943
  CATG B  EXCEPTION VALUES:      243,099,460                         247,986,053
 TOTAL TEST VALUES (4):        7,395,211,821                       7,572,043,659
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          378,602,183
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          7,193,441,476 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           7,395,211,821 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          7,950,645,842 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           7,785,818,265 (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