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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:13:14                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              237/Waller                                                VRSN:      W
                                                        101-914/Katy ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A            2,079,003,648        0.9831         2,114,742,801              43           18,298         .002372604
      2           A            2,071,185,569        0.9844         2,104,008,095              48           12,907         .005104124
      3           A            2,074,759,522        0.9955         2,084,138,144              49            9,416         .003195279
      4           A            2,074,679,275        0.9795         2,118,100,332              45            5,815         .002918626
      5           B              107,150,930        0.7842           136,637,248               5               19         .071980655
      6           B              102,883,711        0.8908           115,495,859               3               10         .013900468
      7           B              116,018,865        0.8910           130,211,970               4                8         .026336457
      8           C               92,136,838        0.1646           559,762,078               8            3,560         .308131913
      9           C               89,427,975        0.6700           133,474,590               8            1,786         .153156553
     10           C               90,701,067        0.7829           115,852,685              12              564         .167765219
     11           C               90,722,523        0.7701           117,806,159               7               85         .238038628
     12           D3             163,676,818        0.9898           165,363,526              21            1,728         .036225604
     13           F1             508,524,561        0.7626           666,830,004               9              504         .057973710
     14           F1             507,476,584        0.7233           701,612,863               7              117         .192851888
     15           F1             552,452,591        0.8647           638,895,098               6               34         .009250140
     16           F1             460,549,702        0.9780           470,909,716               3                5         .008443441
     17           L1             205,371,140        1.0237           200,616,528               7            1,844         .016085646
     18           L1             205,434,891        0.9153           224,445,418              12              240         .032369892
     19           L1             206,242,620        0.9328           221,100,579               6               58         .005919365
     20           L1             203,406,099        0.9741           208,814,392               5               17         .020118497
  RANDOM TOTALS:              12,001,804,929                      13,228,818,085             308           57,015
  CATG D1 EXCEPTION VALUES:        8,219,697                           8,219,697
  CATG B  EXCEPTION VALUES:       94,796,155                          99,727,359
 TOTAL TEST VALUES (4):       12,104,820,781                      13,336,765,141
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          666,838,257
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:          12,104,820,781 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:         12,669,926,884 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:         14,003,603,398 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):          12,378,584,901 (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