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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:11:30                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              139/Lamar                                                 VRSN:      P
                                                        139-912/Prairiland ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               10,992,732        0.9454            11,627,599               11              477
           2           A               11,080,765        0.9844            11,256,364               12              282
           3           A               10,980,684        0.9619            11,415,619               13              192
           4           A               10,966,769        0.9030            12,144,816               11              123
           5           D3              49,352,710        0.9861            50,048,383               28            4,161
  RANDOM TOTALS:                       93,373,660                          96,492,781               75            5,235
  CATG J  EXCEPTION VALUES:            11,104,151                          10,992,175
  CATG D1 EXCEPTION VALUES:            14,826,991                          12,501,577
 TOTAL TEST VALUES (4):               119,304,802                         119,986,533
 MARGIN OF ERROR PERCENT:               5.1809123
 MARGIN OF ERROR VALUE:                 6,216,397
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 113,770,136 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  119,304,802 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 126,202,930 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  106,201,590 (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