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DATE: 01/30/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 08:10:23                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              101/Harris                                                VRSN:      W
                                                        101-920/Spring Branch ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A            2,763,696,751        0.9521         2,902,737,896              56           18,394         .008282435
      2           A            2,764,147,741        0.9727         2,841,726,885              57            8,152         .008274893
      3           A            2,763,859,137        0.9446         2,925,957,164              58            4,241         .004340932
      4           A            2,763,038,731        0.9431         2,929,740,994              55            1,873         .008874987
      5           B              128,082,156        0.9084           140,997,530              10               87         .034665347
      6           B              126,643,477        0.9223           137,312,672               8               29         .018099828
      7           B              125,299,052        0.9978           125,575,318               5               18         .001319136
      8           B              124,061,941        1.0282           120,659,347               5               10         .004711060
      9           F1             636,078,088        0.8188           776,841,827              17              854         .087653111
     10           F1             639,774,909        0.8804           726,686,630               8              199         .021176875
     11           F1             637,170,793        0.9591           664,342,397               8               73         .008645338
     12           F1             628,718,355        1.0016           627,714,013               5               19         .002762426
     13           L1             254,889,180        0.9098           280,159,574               9            3,045         .008060664
     14           L1             255,587,193        0.9359           273,092,417               7              462         .005757306
     15           L1             255,380,380        0.9558           267,190,186               8              138         .007704074
     16           L1             253,621,007        0.9024           281,051,648               6               42         .005066231
  RANDOM TOTALS:              15,120,048,891                      16,021,786,498             322           37,636
  CATG D1 EXCEPTION VALUES:          217,357                             216,690
 TOTAL TEST VALUES (4):       15,120,266,248                      16,022,003,188
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:          801,100,159
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:          15,120,266,248 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:         15,220,903,029 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:         16,823,103,347 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):          14,312,526,440 (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