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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:44:01                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              251/Yoakum                                                VRSN:      W
                                                        251-902/Plains ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           D3              11,892,280        0.9000            13,213,644              10            1,988         .165210515
      2           G1             125,071,901        0.9964           125,523,787              35               60         .004479115
  RANDOM TOTALS:                 136,964,181                         138,737,431              45            2,048
  CATG J  EXCEPTION VALUES:        9,795,980                           9,550,854
  CATG D1 EXCEPTION VALUES:       30,822,180                          35,900,790
  CATG G1 EXCEPTION VALUES:      342,367,443                         345,937,122
 TOTAL TEST VALUES (4):          519,949,784                         530,126,197
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           26,506,310
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            503,619,887 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             519,949,784 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            556,632,507 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             615,403,662 (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