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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:37:49                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      W
                                                        220-907/Keller ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A            1,450,897,062        0.9803         1,480,054,128              51           11,279         .002752082
      2           A            1,442,421,090        1.0027         1,438,537,040              48            7,936         .003003765
      3           A            1,444,957,255        0.9780         1,477,461,406              51            5,847         .003461230
      4           A            1,445,345,656        0.9832         1,470,042,368              50            3,622         .004649877
      5           F1             172,842,264        0.9236           187,139,740               7              220         .069694587
      6           F1             173,350,231        0.9731           178,142,258               6               66         .006737652
      7           F1             181,457,543        0.9403           192,978,351               7               23         .028648592
      8           F1             161,258,596        0.8599           187,531,801               2                4         .002996663
  RANDOM TOTALS:               6,472,529,697                       6,611,887,092             222           28,997
  CATG D1 EXCEPTION VALUES:          531,309                             533,988
 TOTAL TEST VALUES (4):        6,473,061,006                       6,612,421,080
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          330,621,054
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          6,281,800,026 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           6,473,061,006 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          6,943,042,134 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           7,424,101,426 (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