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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:07:40                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              110/Hockley                                               VRSN:      P
                                                        110-908/Whitharral ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                  767,483        0.7337             1,046,045                6               40
           2           A                  802,757        0.8003             1,003,070                6               19
           3           A                  724,440        0.8497               852,583                5               12
           4           A                  778,017        0.8002               972,278                4                8
           5           D3               3,640,728        0.9591             3,795,984               20              823
           6           G1               7,780,912        0.8726             8,916,929               15               41
  RANDOM TOTALS:                       14,494,337                          16,586,889               56              943
  CATG J  EXCEPTION VALUES:               407,140                             480,676
  CATG D1 EXCEPTION VALUES:             8,580,265                           6,944,640
  CATG G1 EXCEPTION VALUES:             2,381,808                           2,555,577
 TOTAL TEST VALUES (4):                25,863,550                          26,567,782
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 1,328,389
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  25,239,393 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   25,863,550 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  27,896,171 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   27,404,494 (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