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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:05:36                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              101/Harris                                                VRSN:      P
                                                        101-921/Tomball ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              456,261,877        0.9688           470,955,695               49            3,954
           2           A              457,433,741        0.9866           463,646,606               50            2,575
           3           A              455,687,515        0.9766           466,606,098               50            2,000
           4           A              455,912,539        0.9888           461,076,597               47            1,212
           5           F1              86,041,617        0.9522            90,360,866                7              300
           6           F1              85,579,218        0.9850            86,882,455                7               79
           7           F1              90,326,974        0.9074            99,544,825                6               26
           8           F1              80,966,192        0.9912            81,685,020                3                8
           9           L1              43,675,789        0.8291            52,678,554                8              752
          10           L1              43,822,982        0.9568            45,801,612                8              144
          11           L1              43,700,335        0.9998            43,709,077                6               42
  RANDOM TOTALS:                    2,299,408,779                       2,362,947,405              241           11,092
  CATG D1 EXCEPTION VALUES:            12,577,980                          12,294,623
  CATG L1 EXCEPTION VALUES:            38,967,180                          41,989,461
 TOTAL TEST VALUES (4):             2,350,953,939                       2,417,231,489
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               120,861,574
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               2,296,369,915 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                2,350,953,939 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               2,538,093,063 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                3,121,506,650 (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