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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:36:41                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              212/Smith                                                 VRSN:      W
                                                        212-901/Arp ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               36,581,911        1.0637            34,391,192              12              599         .126847178
      2           A               36,508,998        1.0194            35,814,202              11              252         .033017585
      3           A               36,787,295        0.9867            37,283,161              16              154         .006164276
      4           A               36,285,003        1.0198            35,580,509               6               80         .005070037
      5           D3              37,059,700        1.0072            36,794,778              29            2,600         .074858498
      6           G1              26,759,385        1.1260            23,764,996               6               57         .033576817
      7           G1              26,824,654        0.9787            27,408,454               6               28         .018431877
      8           G1              27,555,281        1.1242            24,511,013               5               23         .010906160
      9           G1              25,723,757        0.9687            26,554,926               5               15         .016585420
  RANDOM TOTALS:                 290,085,984                         282,103,231              96            3,808
  CATG D1 EXCEPTION VALUES:        6,373,639                           4,878,565
 TOTAL TEST VALUES (4):          296,459,623                         286,981,796
 MARGIN OF ERROR PERCENT:          5.0000001
 MARGIN OF ERROR VALUE:           14,349,090
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            272,632,706 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             296,459,623 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            301,330,886 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             313,729,765 (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