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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:55:50                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              109/Hill                                                  VRSN:      W
                                                        109-912/Aquilla ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                1,994,355        0.8827             2,259,380               6               81         .039005599
      2           A                1,988,607        0.9729             2,043,999               7               42         .009378566
      3           A                1,947,763        0.9787             1,990,153               5               25         .003222947
      4           A                1,916,055        0.9941             1,927,427               5               14         .000854370
      5           D3              23,798,550        0.9314            25,551,374              23            1,199         .050428490
  RANDOM TOTALS:                  31,645,330                          33,772,333              46            1,361
  CATG J  EXCEPTION VALUES:        1,667,869                           1,633,618
  CATG D1 EXCEPTION VALUES:        4,549,249                           3,866,979
 TOTAL TEST VALUES (4):           37,862,448                          39,272,930
 MARGIN OF ERROR PERCENT:          6.1611828
 MARGIN OF ERROR VALUE:            2,419,677
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             36,853,253 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              37,862,448 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             41,692,607 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              36,575,099 (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