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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:26:25                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              254/Zavala                                                VRSN:      W
                                                        254-902/LaPryor ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,204,848        0.9479             2,326,034              15              193         .032867005
      2           A                2,183,199        0.9346             2,335,972              15              101         .019292967
      3           A                2,189,319        0.9566             2,288,646              15               71         .017860155
      4           A                2,188,801        1.0049             2,178,128              13               40         .007073545
      5           D3               7,367,205        0.7624             9,663,175              22              983         .567889593
      6           G1               2,290,348        1.0646             2,151,370              21               33         .013128094
  RANDOM TOTALS:                  18,423,720                          20,943,325             101            1,421
  CATG J  EXCEPTION VALUES:        5,618,583                           5,626,130
  CATG D1 EXCEPTION VALUES:       11,229,745                          11,385,715
 TOTAL TEST VALUES (4):           35,272,048                          37,955,170
 MARGIN OF ERROR PERCENT:          8.0693987
 MARGIN OF ERROR VALUE:            3,062,754
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             34,892,416 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:              35,272,048 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:             41,017,924 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):              36,436,261 (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