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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:24:39                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              245/Willacy                                               VRSN:      W
                                                        245-904/San Perlita ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                5,964,311        0.9961             5,987,663              16              250         .017830503
      2           A                5,942,561        1.0302             5,768,357              16              141         .008544846
      3           A                5,984,275        1.0174             5,881,929              15               87         .002327097
      4           A                5,855,144        0.9504             6,160,715              14               46         .004555825
      5           C                  995,204        0.9059             1,098,580               7              217         .027596673
      6           C                1,000,099        0.9379             1,066,317               6               89         .018407123
      7           C                  988,060        1.0052               982,949               6               29         .000695793
      8           D3               3,257,218        0.9104             3,577,788              10               92         .010744018
      9           F1               2,970,964        0.8216             3,616,071               9               39         .050402473
  RANDOM TOTALS:                  32,957,836                          34,140,369              99              990
  CATG J  EXCEPTION VALUES:        1,324,506                           1,329,502
  CATG D1 EXCEPTION VALUES:       16,917,201                          18,512,349
  CATG C  EXCEPTION VALUES:          752,917                             752,917
 TOTAL TEST VALUES (4):           51,952,460                          54,735,137
 MARGIN OF ERROR PERCENT:          5.0000003
 MARGIN OF ERROR VALUE:            2,736,757
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:              51,952,460 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:             51,998,380 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             57,471,894 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              58,924,510 (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