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DATE: 01/26/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:21:17                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              026/Burleson                                              VRSN:      W
                                                        026-902/Somerville ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               12,883,778        0.7665            16,808,582              15              660         .158323770
      2           A               12,900,404        0.9665            13,347,547              15              355         .084259021
      3           A               12,857,748        0.8848            14,531,813              15              233         .013608475
      4           A               12,854,853        0.9298            13,825,396              15              145         .020428052
      5           C                2,760,916        1.2233             2,256,941              14            1,522         .225059333
      6           C                3,640,498        1.4025             2,595,720               8            1,326         .046263994
      7           C                1,844,133        1.4171             1,301,343              10              512         .238659594
      8           C                2,741,679        0.9876             2,776,103               7              192         .020928913
      9           D3              33,502,948        1.0351            32,366,871              29            1,981         .020653262
     10           G1               6,449,239        1.0475             6,156,791               6               37         .042111444
     11           G1               6,675,492        0.8802             7,584,063               4               11         .101418015
     12           G1               6,558,199        1.0484             6,255,436               3                6         .030125382
     13           G1               5,016,518        1.1402             4,399,683               2                3         .005630668
  RANDOM TOTALS:                 120,686,405                         124,206,289             143            6,983
  CATG J  EXCEPTION VALUES:        8,957,082                           9,114,516
  CATG D1 EXCEPTION VALUES:        3,040,670                           2,535,323
 TOTAL TEST VALUES (4):          132,684,157                         135,856,128
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            6,792,806
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            129,063,322 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             132,684,157 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            142,648,934 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             159,215,696 (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