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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:37:32                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              025/Brown                                                 VRSN:      W
                                                        025-906/Zephyr ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                  789,599        0.9863               800,567               8               50         .000926104
      2           A                  792,110        0.9861               803,276               7               24         .000623220
      3           A                  771,120        0.9704               794,641               7               15         .000789659
      4           A                  742,125        0.9807               756,730               7                8         .000272105
      5           D3              12,704,250        0.9688            13,113,388              37              819         .040117099
  RANDOM TOTALS:                  15,799,204                          16,268,602              66              916
  CATG J  EXCEPTION VALUES:        6,429,780                           6,593,385
  CATG D1 EXCEPTION VALUES:        3,296,500                           3,114,437
 TOTAL TEST VALUES (4):           25,525,484                          25,976,424
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            1,298,821
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             24,677,603 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              25,525,484 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             27,275,245 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              24,893,238 (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