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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:55:32                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              109/Hill                                                  VRSN:      W
                                                        109-903/Covington ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                3,208,112        1.0311             3,111,349               8               80         .039943789
      2           A                3,157,549        1.0310             3,062,608               6               46         .001124809
      3           A                3,236,894        1.0348             3,128,038              10               33         .010558015
      4           A                3,047,873        1.0712             2,845,288               6               22         .001339227
      5           D3              32,353,910        0.9950            32,516,492              30            1,126         .012707358
  RANDOM TOTALS:                  45,004,338                          44,663,775              60            1,307
  CATG D1 EXCEPTION VALUES:        2,881,179                           2,489,305
 TOTAL TEST VALUES (4):           47,885,517                          47,153,080
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            2,357,654
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             44,795,426 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              47,885,517 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             49,510,734 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              41,155,666 (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