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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:40:20                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              039/Clay                                                  VRSN:      W
                                                        039-901/Byers ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,502,970        0.9807             2,552,228               9               91         .012752491
      2           A                2,482,584        0.9707             2,557,519              10               47         .012206330
      3           A                2,504,411        1.0016             2,500,410               7               33         .007339817
      4           A                2,410,931        1.0667             2,260,177              12               22         .004649680
      5           D3               4,404,670        1.0183             4,325,513              10              465         .007794393
  RANDOM TOTALS:                  14,305,566                          14,195,847              48              658
  CATG J  EXCEPTION VALUES:          720,029                             757,706
  CATG D1 EXCEPTION VALUES:        4,448,920                           4,289,637
 TOTAL TEST VALUES (4):           19,474,515                          19,243,190
 MARGIN OF ERROR PERCENT:          5.0000026
 MARGIN OF ERROR VALUE:              962,160
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             18,281,030 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              19,474,515 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             20,205,350 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              18,048,483 (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