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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 10:49:41                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              087/Glasscock                                             VRSN:      W
                                                        087-901/Glasscock County ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           D3              17,146,060        0.9577            17,903,373              20            3,187         .061998812
      2           G1              81,446,926        0.9724            83,758,665              15              232         .006398362
      3           G1              81,718,529        0.9832            83,114,859              31               67         .007887416
      4           G1              85,855,074        0.9353            91,794,156              19               20         .053776145
  RANDOM TOTALS:                 266,166,589                         276,571,053              85            3,506
  CATG J  EXCEPTION VALUES:       13,082,109                          13,118,998
  CATG D1 EXCEPTION VALUES:       13,669,880                          24,637,209
  CATG G1 EXCEPTION VALUES:      194,629,955                         188,394,477
 TOTAL TEST VALUES (4):          487,548,533                         502,721,737
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:           25,136,087
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            477,585,650 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             487,548,533 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            527,857,824 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             549,055,653 (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