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DATE: 06/29/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:22:08                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              233/Val Verde                                             VRSN:      W
                                                        233-903/Comstock Cons ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,600,843        0.9461             2,749,015               9               47         .001165657
      2           A                2,544,268        0.9297             2,736,655               8               23         .005192133
      3           A                2,707,104        0.9334             2,900,261               9               17         .002983829
      4           D3              16,397,871        0.9536            17,195,754              10            4,025         .006384153
      5           G1              17,764,519        0.8773            20,249,081               6               27         .083219537
      6           G1              19,412,001        1.0505            18,478,821               4               11         .013752136
      7           G1              18,720,448        1.0392            18,014,288               3                6         .000441660
  RANDOM TOTALS:                  80,147,054                          82,323,875              49            4,156
  CATG J  EXCEPTION VALUES:       15,670,116                          15,556,535
  CATG D1 EXCEPTION VALUES:       17,427,940                          21,127,734
  CATG A  EXCEPTION VALUES:          740,060                             752,166
  CATG G1 EXCEPTION VALUES:       14,525,573                          14,495,839
 TOTAL TEST VALUES (4):          128,510,743                         134,256,149
 MARGIN OF ERROR PERCENT:          5.0000000
 MARGIN OF ERROR VALUE:            6,712,807
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:            127,543,342 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             128,510,743 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            140,968,956 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             150,485,069 (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