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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:46:08                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              070/Ellis                                                 VRSN:      W
                                                        070-901/Avalon ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,542,962        1.0000             2,542,962              12               60         .014739132
      2           A                2,551,617        0.9629             2,649,929              17               36         .010216217
      3           A                2,535,176        0.9657             2,625,221              15               26         .007787028
      4           D3              10,016,139        0.9235            10,845,846              29              555         .063691038
      5           F1               3,146,420        1.0741             2,929,355               6                8         .050358309
  RANDOM TOTALS:                  20,792,314                          21,593,313              79              685
  CATG J  EXCEPTION VALUES:        1,507,867                           1,575,854
  CATG D1 EXCEPTION VALUES:        3,547,280                           3,857,260
  CATG A  EXCEPTION VALUES:        2,089,150                           2,105,102
 TOTAL TEST VALUES (4):           27,936,611                          29,131,529
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            1,456,576
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             27,674,953 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              27,936,611 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             30,588,105 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              28,119,048 (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