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DATE: 06/22/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:05:56                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              101/Harris                                                VRSN:      W
                                                        101-919/Spring ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A              845,905,876        0.9749           867,684,764               50            9,145
           2           A              841,208,264        0.9955           845,010,813               50            7,297
           3           A              843,084,506        0.9993           843,675,079               50            5,688
           4           A              842,087,860        1.0272           819,789,583               49            3,744
           5           B              134,327,004        0.7723           173,931,120                6               32
           6           B              137,102,789        0.8150           168,224,281                6               22
           7           B              133,424,829        0.9055           147,349,342                5               16
           8           B              134,869,454        0.8546           157,815,883                5               11
           9           F1             266,522,119        0.8904           299,328,525                7              455
          10           F1             267,018,820        1.0439           255,789,654                7              142
          11           F1             269,723,256        0.8907           302,821,664                7               67
          12           F1             260,919,901        0.9656           270,215,308                6               23
          13           L1             106,650,977        1.0383           102,716,919               10            1,628
          14           L1             107,376,181        0.9750           110,129,416                9              264
          15           L1             108,718,606        0.9442           115,143,620                7               71
          16           L1             103,881,816        0.9465           109,753,635                6               18
  RANDOM TOTALS:                    5,402,822,258                       5,589,379,606              280           28,623
  CATG D1 EXCEPTION VALUES:            12,623,438                          12,595,832
 TOTAL TEST VALUES (4):             5,415,445,696                       5,601,975,438
 MARGIN OF ERROR PERCENT:               5.0000000
 MARGIN OF ERROR VALUE:               280,098,772
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:               5,321,876,666 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                5,415,445,696 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:               5,882,074,210 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                6,096,358,736 (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