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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:35:38                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              018/Bosque                                                VRSN:      W
                                                        018-905/Walnut Springs ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,883,792        0.9825             2,935,157               8              122         .011730699
      2           A                2,912,716        0.9789             2,975,499               7               68         .012649790
      3           A                2,862,942        0.9487             3,017,753               8               42         .010425941
      4           A                2,832,365        0.9884             2,865,606               6               20         .003531091
      5           D3              22,415,358        1.0071            22,257,331              21              735         .009169992
  RANDOM TOTALS:                  33,907,173                          34,051,346              50              987
  CATG J  EXCEPTION VALUES:        3,608,923                           3,660,231
  CATG D1 EXCEPTION VALUES:        5,177,770                           4,253,607
 TOTAL TEST VALUES (4):           42,693,866                          41,965,184
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            2,098,259
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             39,866,925 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              42,693,866 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             44,063,443 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              44,976,457 (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