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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:20:28                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              225/Titus                                                 VRSN:      W
                                                        225-906/Chapel Hill ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A               10,599,640        0.7722            13,726,548              15              185         .033406776
      2           A               10,500,936        0.9360            11,218,949              15               96         .022301136
      3           A               10,536,623        0.9139            11,529,295              15               62         .018358979
      4           A               10,430,274        0.9744            10,704,304              14               40         .006654440
      5           D3              30,023,797        0.7878            38,110,938              20            1,478         .140605835
  RANDOM TOTALS:                  72,091,270                          85,290,034              79            1,861
  CATG J  EXCEPTION VALUES:        3,354,536                           3,294,847
  CATG D1 EXCEPTION VALUES:        3,176,391                           2,862,396
 TOTAL TEST VALUES (4):           78,622,197                          91,447,277
 MARGIN OF ERROR PERCENT:          7.1433488
 MARGIN OF ERROR VALUE:            6,532,398
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:              78,622,197 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:             84,914,879 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             97,979,675 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              75,500,985 (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