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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:07:34                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              110/Hockley                                               VRSN:      P
                                                        110-905/Ropes ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A                2,461,648        1.0979             2,242,142                7              106
           2           A                2,488,216        0.9982             2,492,703                6               45
           3           A                2,394,697        1.0266             2,332,649                6               29
           4           A                2,455,467        1.0630             2,309,941                6               20
           5           D3              11,665,482        0.8308            14,041,264               14            1,052
  RANDOM TOTALS:                       21,465,510                          23,418,699               39            1,252
  CATG J  EXCEPTION VALUES:             2,267,630                           1,939,288
  CATG D1 EXCEPTION VALUES:            12,869,577                           9,627,805
 TOTAL TEST VALUES (4):                36,602,717                          34,985,792
 MARGIN OF ERROR PERCENT:               6.2928745
 MARGIN OF ERROR VALUE:                 2,201,612
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                  32,784,180 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                   36,602,717 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                  37,187,404 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                   44,553,233 (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