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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:06:40                                       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                2,488,235        1.0000             2,488,235              12               60         .014739132
      2           A                2,496,704        0.9379             2,662,015              17               36         .015495963
      3           A                2,480,616        0.9251             2,681,457              15               26         .014206479
      4           D3              10,058,520        0.9030            11,139,003              29              552         .084183583
      5           F1               3,095,090        1.0741             2,881,566               6                7         .050358309
  RANDOM TOTALS:                  20,619,165                          21,852,276              79              681
  CATG J  EXCEPTION VALUES:        1,507,867                           1,619,654
  CATG D1 EXCEPTION VALUES:        3,547,280                           4,347,073
  CATG A  EXCEPTION VALUES:        2,089,150                           2,105,102
 TOTAL TEST VALUES (4):           27,763,462                          29,924,105
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            1,496,205
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:              27,763,462 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:             28,427,900 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             31,420,310 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              28,396,823 (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