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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:22:40                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              228/Trinity                                               VRSN:      P
                                                        228-901/Groveton ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               11,663,830        1.0245            11,384,900               16              702
           2           A               11,640,852        0.9374            12,418,233               15              402
           3           A               11,652,487        0.8818            13,214,433               15              261
           4           A               11,649,472        0.9678            12,037,066               18              146
           5           C                4,300,428        1.3794             3,117,608               15            1,342
           6           C                4,218,435        1.1306             3,731,147               15              901
           7           C                1,849,935        1.3276             1,393,443               15              333
           8           C                3,375,083        1.0517             3,209,169               16              264
           9           D3              28,431,219        1.0551            26,946,469               20            5,146
  RANDOM TOTALS:                       88,781,741                          87,452,468              145            9,497
  CATG J  EXCEPTION VALUES:             4,426,257                           4,321,384
  CATG D1 EXCEPTION VALUES:            39,118,243                          33,001,710
 TOTAL TEST VALUES (4):               132,326,241                         124,775,562
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:                 6,238,778
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 118,536,784 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:                 131,014,340 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  132,326,241 (OUTSIDE CONFIDENCE INTERVAL)
 VALUE ASSIGNED (6):                  127,744,035 (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