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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:08:46                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              114/Howard                                                VRSN:      W
                                                        114-901/Big Spring ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               64,173,353        0.9208            69,693,042               16            3,084
           2           A               64,165,307        0.9824            65,314,848               22            1,540
           3           A               64,198,095        0.9695            66,217,736               20              899
           4           A               64,095,992        0.9855            65,039,058               24              480
           5           F1              21,951,248        0.9185            23,899,018               13              382
           6           F1              21,992,943        0.8697            25,287,965               13              100
           7           F1              22,826,033        1.0136            22,519,764                8               23
           8           F1              21,102,512        1.0893            19,372,544                3                4
           9           G1              67,751,344        1.0013            67,663,382               14              122
          10           L1              13,591,251        0.9896            13,734,085                8              331
          11           L1              13,756,285        1.0509            13,090,004                8               67
          12           L1              26,955,201        0.9855            27,351,802                8               21
  RANDOM TOTALS:                      466,559,564                         479,183,248              157            7,053
  CATG J  EXCEPTION VALUES:            27,368,221                          27,841,330
  CATG D1 EXCEPTION VALUES:             7,121,492                           4,084,640
 TOTAL TEST VALUES (4):               501,049,277                         511,109,218
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                25,555,461
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 485,553,757 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  501,049,277 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 536,664,679 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  644,674,034 (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