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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:42:46                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              050/Coryell                                               VRSN:      W
                                                        050-904/Oglesby ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                1,420,614        0.8259             1,720,080              15               61         .049705795
      2           A                1,450,066        0.7608             1,905,975              17               42         .057936968
      3           A                1,432,900        0.8615             1,663,262              15               26         .052905990
      4           A                1,366,603        0.7797             1,752,729              12               16         .017408842
      5           D3              17,228,766        0.9972            17,277,142              22              806         .071549639
  RANDOM TOTALS:                  22,898,949                          24,319,188              81              951
  CATG J  EXCEPTION VALUES:        1,466,453                           1,477,383
  CATG D1 EXCEPTION VALUES:        4,159,190                           3,889,767
 TOTAL TEST VALUES (4):           28,524,592                          29,686,338
 MARGIN OF ERROR PERCENT:          6.5827789
 MARGIN OF ERROR VALUE:            1,954,186
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             27,732,152 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              28,524,592 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             31,640,524 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              25,692,393 (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