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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:26:03                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              251/Yoakum                                                VRSN:      P
                                                        251-902/Plains ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           D3              12,092,910        0.9626            12,562,757               11            2,003
           2           G1             356,609,840        0.8780           406,161,549               15              229
  RANDOM TOTALS:                      368,702,750                         418,724,306               26            2,232
  CATG J  EXCEPTION VALUES:             8,992,170                           8,640,899
  CATG D1 EXCEPTION VALUES:            29,971,853                          25,773,592
 TOTAL TEST VALUES (4):               407,666,773                         453,138,797
 MARGIN OF ERROR PERCENT:              20.5673965
 MARGIN OF ERROR VALUE:                93,198,853
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 359,939,944 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  407,666,773 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 546,337,650 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  471,109,117 (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