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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:57:00                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              113/Houston                                               VRSN:      W
                                                        113-902/Grapeland ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               13,036,152        0.9708            13,428,257               9              401         .005569192
      2           A               13,031,924        1.0258            12,704,157               8              227         .010261000
      3           A               12,983,656        0.9412            13,794,790               7              159         .013087257
      4           A               12,976,417        0.8804            14,739,229               7               93         .027725231
      5           D3              50,758,960        0.9877            51,391,070              34            4,051         .040913591
      6           G1              29,992,370        1.1098            27,025,023               8               41         .001583785
  RANDOM TOTALS:                 132,779,479                         133,082,526              73            4,972
  CATG J  EXCEPTION VALUES:        7,332,796                           7,609,202
  CATG D1 EXCEPTION VALUES:       17,680,720                          16,238,937
 TOTAL TEST VALUES (4):          157,792,995                         156,930,665
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            7,846,533
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            149,084,132 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             157,792,995 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            164,777,198 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             192,732,122 (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