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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:39:36                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              228/Trinity                                               VRSN:      W
                                                        228-901/Groveton ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               11,713,986        1.0201            11,483,174              16              731         .205610976
      2           A               11,714,627        0.8680            13,496,114              17              405         .057151527
      3           A               11,711,947        0.8759            13,371,329              19              256         .051852577
      4           A               11,680,021        0.9129            12,794,415              15              132         .039412602
      5           C                4,263,018        0.8320             5,123,820              12            1,327         .013835762
      6           C                4,078,761        1.0163             4,013,344              13              867         .003448312
      7           C                1,969,678        1.0909             1,805,553              11              347         .077058963
      8           C                3,391,145        0.9234             3,672,455              12              243         .074049127
      9           D3              29,014,771        0.9521            30,474,500              21            5,145         .019540486
  RANDOM TOTALS:                  89,537,954                          96,234,704             136            9,453
  CATG J  EXCEPTION VALUES:        4,530,280                           4,700,486
  CATG D1 EXCEPTION VALUES:       40,903,873                          37,600,605
 TOTAL TEST VALUES (4):          134,972,107                         138,535,795
 MARGIN OF ERROR PERCENT:          5.0000002
 MARGIN OF ERROR VALUE:            6,926,790
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            131,609,005 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             134,972,107 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            145,462,585 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             130,420,768 (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