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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:55:40                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              014/Bell                                                  VRSN:      W
                                                        014-901/Academy ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               23,908,917        0.9504            25,156,689              10              378         .004657810
      2           A               23,951,667        1.0212            23,454,433               8              241         .002508878
      3           A               23,880,813        0.9785            24,405,532              16              173         .006046657
      4           A               23,780,532        0.9664            24,607,339               6               68         .006523136
      5           D3              36,452,175        0.8778            41,526,743              13            1,286         .022853378
  RANDOM TOTALS:                 131,974,104                         139,150,736              53            2,146
  CATG J  EXCEPTION VALUES:        9,398,105                          10,416,112
  CATG D1 EXCEPTION VALUES:        5,838,085                           5,509,725
 TOTAL TEST VALUES (4):          147,210,294                         155,076,573
 MARGIN OF ERROR PERCENT:          5.0000002
 MARGIN OF ERROR VALUE:            7,753,829
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:             147,210,294 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:            147,322,744 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:            162,830,402 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             139,535,949 (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