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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:20:37                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              226/Tom Green                                             VRSN:      W
                                                        226-903/San Angelo ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              447,031,289        0.9817           455,364,459              46           10,783         .004813192
      2           A              445,412,623        0.9824           453,392,328              43            5,759         .002377474
      3           A              446,202,416        0.9786           455,959,959              46            3,963         .002059014
      4           A              446,198,624        0.9851           452,947,542              43            2,091         .002342476
      5           F1             124,144,390        0.9237           134,399,036              16            1,054         .015767357
      6           F1             124,055,263        0.7982           155,418,771              11              308         .110944771
      7           F1             124,423,402        0.9094           136,819,224              12               92         .019070390
      8           F1             123,397,428        0.9553           129,171,389               8               22         .003744929
      9           L1              69,357,255        0.9730            71,281,865               8            1,094         .031133588
     10           L1              69,377,800        1.1079            62,620,995              10              205         .024575225
     11           L1              70,192,727        1.0462            67,093,029               8               64         .027766956
     12           L1              68,499,778        1.0438            65,625,386               9               16         .009232266
  RANDOM TOTALS:               2,558,292,995                       2,640,093,983             260           25,451
  CATG D1 EXCEPTION VALUES:        6,307,890                           5,853,657
 TOTAL TEST VALUES (4):        2,564,600,885                       2,645,947,640
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          132,297,382
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          2,513,650,258 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           2,564,600,885 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          2,778,245,022 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           2,531,683,952 (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