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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:19:23                                       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            1,450,996,996        0.9803         1,480,156,071              51           11,279         .002752082
      2           A            1,442,520,440        1.0027         1,438,636,122              48            7,936         .003003765
      3           A            1,445,056,780        0.9780         1,477,563,170              51            5,847         .003461230
      4           A            1,445,445,208        0.9832         1,470,143,621              50            3,622         .004649877
      5           F1             172,538,691        0.9236           186,811,056               7              220         .069694587
      6           F1             173,045,766        0.9731           177,829,376               6               66         .006737652
      7           F1             181,138,839        0.9403           192,639,412               7               23         .028648592
      8           F1             160,975,368        0.8599           187,202,428               2                4         .002996663
  RANDOM TOTALS:               6,471,718,088                       6,610,981,256             222           28,997
  CATG D1 EXCEPTION VALUES:          531,396                             531,715
 TOTAL TEST VALUES (4):        6,472,249,484                       6,611,512,971
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          330,575,649
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          6,280,937,322 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           6,472,249,484 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          6,942,088,620 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           7,407,839,947 (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