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DATE: 01/30/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 08:10:13                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              236/Walker                                                VRSN:      W
                                                        093-905/Richards ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                1,044,695        0.9175             1,138,632               6               26         .017580382
      2           A                1,021,256        0.8920             1,144,906               5               16         .013280024
      3           A                  965,606        0.8439             1,144,219               4               11         .005810108
      4           A                  958,589        0.8622             1,111,794               4                7         .002190352
      5           D3              13,435,750        0.7797            17,231,948              19              495         .105055928
  RANDOM TOTALS:                  17,425,896                          21,771,499              38              555
  CATG D1 EXCEPTION VALUES:        2,536,890                           2,433,840
 TOTAL TEST VALUES (4):           19,962,786                          24,205,339
 MARGIN OF ERROR PERCENT:         10.5600421
 MARGIN OF ERROR VALUE:            2,556,094
 CONFIDENCE INTERVAL VALUES (5):
   LOCAL TEST VALUE:              19,962,786 (OUTSIDE CONFIDENCE INTERVAL)
   STATE LOWER LIMIT:             21,649,245 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   STATE UPPER LIMIT:             26,761,433 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              17,291,946 (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