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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:13:24                                       2005 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   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A              908,913,111        0.9811           926,422,496              56            9,589         .005339903
      2           A              905,418,415        1.0038           901,990,850              57            7,710         .016734403
      3           A              905,980,545        0.9832           921,461,091              56            6,134         .008495601
      4           A              903,756,228        1.0180           887,776,255              55            4,106         .015270385
      5           B              141,312,125        0.9696           145,742,703               6               33         .022836232
      6           B              138,429,289        0.9292           148,976,850               5               22         .006647204
      7           B              142,127,752        1.0187           139,518,751               7               17         .016667921
      8           B              136,995,968        0.9506           144,115,262               6               11         .008188312
      9           F1             290,170,364        0.8597           337,525,141              10              454         .046668455
     10           F1             290,581,619        0.9417           308,571,327               9              147         .036516121
     11           F1             287,255,307        0.8958           320,669,019               9               72         .050244829
     12           F1             287,894,347        0.9509           302,759,856               6               28         .008921627
     13           L1             111,236,652        0.9216           120,699,492               8            1,689         .011434297
     14           L1             111,547,015        0.9453           118,001,708               8              269         .003932242
     15           L1             111,237,329        0.9473           117,425,661               7               79         .007592336
     16           L1             110,138,197        0.9603           114,691,447               5               19         .018373661
  RANDOM TOTALS:               5,782,994,263                       5,956,347,909             310           30,379
  CATG D1 EXCEPTION VALUES:       14,211,776                          14,191,632
 TOTAL TEST VALUES (4):        5,797,206,039                       5,970,539,541
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          298,526,977
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:          5,672,012,564 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:           5,797,206,039 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:          6,269,066,518 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):           6,599,975,567 (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